Take command of HEROCORP™ and launch a Preemptive Defence Campaign™ against parallel dimensions in OTTTD, the most outrageous Tower Defence title around.
User reviews:
Mostly Positive (177 reviews) - 78% of the 177 user reviews for this game are positive.
Release Date: Aug 6, 2014

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SUMMER SALE! Offer ends July 4


Buy OTTTD - Deluxe Edition

Includes OTTTD + 1 Dexluso Armour type, 1 Dexluso Gun and a Deluxe Wallet - 69,000 starter coins and 11 medals.

SUMMER SALE! Offer ends July 4


Buy OTTTD - OTT Edition

Includes Deluxe edition + Art Book PDF, OTTTD poster artwork, 3D Printer files for the HEROCORP soldiers, Your name in the credits as an OTT supporter and a OTT Wallet stuffed with 101,010 coins and 42 medals.

SUMMER SALE! Offer ends July 4


Recent updates View all (6)

June 7

Surprise Attack Sale, OTTTD 50% off!

Listen up soldier! Just a quick update to let you know that Surprise Attack Games is having a sale to celebrate a brand new localisation update for their terminal-based hacking game, Hacknet. So tell all your friends, because there are some great deals, including 50% off OTTTD!


You can also view the entire Surprise Attack Games catalogue by clicking here!

Until next time, watch out for those sharks!

Steve - Community Manager

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About This Game

Lock, load and let the gibs fly in OTTTD, a Tower Defence/RTS game with RPG elements that pits you against some of the weirdest creatures in the multiverse.

OTTTD stands for Over The Top Tower Defence, and you'll see why when you're blasting 9 kinds of hell out of a Cactus Ghost that's making a beeline for your battlefield HQ. You play as a commander for HEROCORP™, the 4th largest private military organization in the galaxy. A long period of peace has left the company coffers a little bare so the science division developed Trans-Dimensional Rifts, opening up lucrative opportunities for war in other universes. It's like Starship Troopers meets Stargate meets Spaceballs, with way more explosions!


Ridiculously definitive edition
Prepare your eyes and ears for incredible deluxe-ness! Featuring crisper sound and high resolution graphics, the PC release of OTTTD will leave you feeling like you've actually stepped into an alternate universe and started blasting everything to smithereens.

Deep RPG Mechanics
OTTTD lets you choose from 7 hero classes to make up your squad of 3 battlefield employees. The more action they see the more XP they earn, giving you the chance to level them up through custom skill trees, including powerful combat abilities to unleash during the fight.
• 30+ active abilities
• 40+ passive skills
• 30+ equippable weapons
• multiple armor options with stats to suit your play-style

Weapons! Weapons! WEAPONS!
With 12 tower types to build and 6 different firearm classes, HEROCORP™ has got the hardware to ensure you can wreak havoc in your own personal style.

Disgustingly varied foes
The range of enemies in OTTTD is wide enough to soothe even the itchiest trigger finger. Floating eyeballs? Check. Gunclams? You know it. Giant armored Wartoises? Of course. You'll even go toe to fin with a giant flying shark, and show the mythological Kraken who's boss!

The Story
The year is 2136. You work for HEROCORP™, the universe’s 4th largest private military force. Your job is to “preemptively defend” the Earth against alien dimensions. As long as you complete the missions under budget and fill out the TPS reports in triplicate, everything goes smoothly.

Is pre-emptively defending Earth ethical? Who cares when the money’s good!

Deluxe Edition

HEROCORP understands the needs of the more discerning battle commander, hence the Deluxe Edition of OTTTD. In addition to everything in the pre-order, you'll get the Deluxo weapon and armor sets. Recently developed by our Lab Division, the Deluxo Range gets more powerful each time your soldier levels up, making it worth its weight in requisition forms. We'll also throw in a Deluxe Wallet, with 69,000 coins and 11 medals to buy yourself something nice.

• Dexluso Armour - Armour that gets stronger as you get stronger
• Dexluso Gun - Gun that gets stronger as you get stronger
• Deluxe Wallet - 69,000 starter coins and 11 starter medals

OTT Edition

In addition to everything in the Deluxe Edition, the OTT edition comes with rare Cheese Armor set forged by our Dairy Division, which helps your soldiers get more XP and coins on the battlefield.

You will also receive these bad boys:
• An Art Book PDF, full of concept sketches plus more visual treats.
• OTTTD poster artwork. Looks amazing on 100% of walls.
• 3D Printer files for the HEROCORP soldiers, so you can battle command IRL.
• Your name in the credits as an OTT supporter. Welcome to history, baby.
• An OTT Wallet stuffed with 101,010 coins and 42 medals, to give you the financial edge on your enemies."
• Bonus Armour - “Vintage Combat Cheddar” - 20% XP bonus and 5% coin bonus

System Requirements

Mac OS X
SteamOS + Linux
    • OS: Microsoft® Windows® XP/Vista or later
    • Processor: 1.4GHz or faster
    • Memory: 1 GB RAM
    • Graphics: Any from the last 4 years
    • DirectX: Version 9.0
    • Storage: 300 MB available space
    • Sound Card: All soundcards would work
    • OS: 10.7+
    • Processor: 1.4GHz or faster
    • Memory: 1 GB RAM
    • Graphics: Any from the last 4 years
    • Storage: 300 MB available space
    • Sound Card: All soundcards would work
    • Processor: 1.4GHz or faster
    • Memory: 1 GB RAM
    • Graphics: Any from the last 4 years
    • Storage: 300 MB available space
    • Sound Card: All soundcards would work
Customer reviews
Customer Review system updated! Learn more
Mostly Positive (177 reviews)
Recently Posted
Ass Juice the 3rd
( 17.5 hrs on record )
Posted: June 17
this game sucks
Helpful? Yes No Funny
A Kings Ransom
( 0.2 hrs on record )
Posted: June 17
Do you know why so many tower defense games are browser or mobile titles? Neither does OTTTD.
Helpful? Yes No Funny
( 27.5 hrs on record )
Posted: June 15
An okay Tower Defense game, which is lacking in balancing and tower diversity. The only plus side is boss fights and enemy composition, but not good enough to be able to recommend it.
Helpful? Yes No Funny
( 4.0 hrs on record )
Posted: June 5
A far cry from games like Kingdom rush, lacks polish and some sense of direction. If you are a nut fan of tower defense games you might find something here, definitely not for someone who appreciates level of quality in their games.
Helpful? Yes No Funny
( 34.0 hrs on record )
Posted: May 30
Fun and interesting take on tower defense. It's like Sanctum, but with a squad that must be field tested and improved in order to advance through the game. Definitely worth the asking price as I've gotten hours of play from it.
Helpful? Yes No Funny
( 19.2 hrs on record )
Posted: March 1
While at first, I was having a lot of fun with this game, it became a little too grindy for my tastes.

The first half of the missions straddle the tactics/tower placement/hero skill tree perfectly, and I was enjoying exploring the various classes and their skill trees to change up my tactics, or find ones best suited to the maps I was playing.

However, the second half of the game is far too frustrating because it always feels like not matter what you do, it's not enough. The best way for me to explain this game is that it feels like a F2P game that had in app purchases to "quick buy" skill points and the better items, except, even if you wanted to do that, that option is not there and time is the only investment.

Again, a mostly fun experience that got really frustrating. After 19 hours I've had some fun with this game, but it's time to move on. A "no" rating from me, unless you're looking for a squad/skill upgrade tower defense game AND you've already played the excellent Defender's Quest.
Helpful? Yes No Funny
( 22.6 hrs on record )
Posted: February 28
Great fun and very challenging!
Helpful? Yes No Funny
( 0.9 hrs on record )
Posted: February 9
So far a really fun tower defense game. The towers have set locations they can be built but the twist is you have hero unites you move around the game area with different abilities. Some can boost or repair towers others are almost mobile towers. The heroes can be leveled up between rounds to gain new abilites or increase existing ones. Fun graphics, music and story all work together to make it fun so far. I am pleased with this purchase.
Helpful? Yes No Funny
( 0.3 hrs on record )
Posted: January 22
Linux Version at least is Buggy, couldn't win the tutorial because one tower did not shoot ever, tried it three times.
Helpful? Yes No Funny
( 34.4 hrs on record )
Posted: January 4
A Tower Defence game with a difference, there are also characters (which makes it a bit more fun than other games in the same genre) to unlock and upgrade with skills, weapons and armours to purchase with the loot you acquire in battle. Had me laughing with some of the things that were said as well as written.

The game mechanics was fairly good as was the game play up to the 4th level, where it seemed to go from fairly easy to wow I got my butt kicked, again and again and again. So nothing for it but to replay level 3 for like ever, while upgrading my only 2 unlocked characters. Considering I played the first 3 levels with 3 stars in like 15-20 mins and spending 2 hours replaying to upgrade and still can't beat level 4, what the hey. Game grinding again, ugh.

The artwork is a bit mediocre but still fairly good. All in all, I enjoyed my experience and want to get back into my grind to see what lies ahead.
Helpful? Yes No Funny
Most Helpful Reviews  In the past 30 days
1 of 1 people (100%) found this review helpful
34.0 hrs on record
Posted: May 30
Fun and interesting take on tower defense. It's like Sanctum, but with a squad that must be field tested and improved in order to advance through the game. Definitely worth the asking price as I've gotten hours of play from it.
Was this review helpful? Yes No Funny
1 of 1 people (100%) found this review helpful
Not Recommended
27.5 hrs on record
Posted: June 15
An okay Tower Defense game, which is lacking in balancing and tower diversity. The only plus side is boss fights and enemy composition, but not good enough to be able to recommend it.
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Most Helpful Reviews  Overall
61 of 73 people (84%) found this review helpful
1 person found this review funny
3.7 hrs on record
Posted: August 6, 2014
I've played for 2 hours and made it to mission 11 of 20. I didn't realize it was a PC port of an android title until after I started playing, so at first I wasn't sure that it was a good choice. It turns out however that;
- It's pretty fun and has some cool and sometimes pretty amusing features
- After playing the standard edition, deluxe and OTT versions don't sound worth it at all

At first maps looked like they were way too small and felt cramped. Tower placement is restricted to spots around the map marked with an X. Also you can't increase the speed of the game. None of these were really an issue in the end later maps were big enough and you just need to make sure you have a good combination of different types of towers in limited locations where you are able to place them. You also have a pool of up to seven heroes, three of which you can take onto the battlefield each stage. I unlocked five of them by stage ten. They can be ordered around the map to attack enemies and also have special abilities which can be upgraded as your heroes level up after completing stages. My favorite heroes were the recon and rocketeer. The rocketeer can periodically call in a powerful cruise missile strike anywhere on the map. The recon was able to mark targets so that the rocketeer and any missile turrets could fire missiles at them even if they were out of range. That was my favorite thing about this game. Not every tower defense game has stuff like that. Also you can buy weapon and armor upgrades for your heroes. This is how you spend your coins and medals. I just bought the standard version of this game so I earned all my currency just by completing stages. Some of the stuff is pretty expensive especially the armor, so I could only afford basic weapon upgrades. This didn't really seem to matter, I still kicked ♥♥♥ without better gear. I don't see why you would want to get the deluxe or OTT editions of this game just for extra coins and medals. 100,000 coins will only get you two sets of basic armor... You also use medals to resurrect fallen heroes between stages, but so far my guys hardly ever died. I don't seem have a shortage of medals. Again another reason why I don't see the point in paying more real money for coins and medals. Why would you pay for extra currency in a non free to play single player game?

Some of the enemy models were really amusing. There are giant disfigured teddy bears that shoot laser beams out there eyes and obese green skinned cleaver wielding zombies that ride mobility scooters lol amd puke gibs all over your turrets and heroes. Also I really liked some of the dialogue, one the heroes sends up Batman 'my throat hurts... do you have a throat lozenge?' lol

Maybe there are actually people out there who want the extra art and stuff. But the Deluxe and OTT editions are over double and triple the price respectively of the standard edition. This problem is easily solved by just getting the standard edition lol, which I recommend trying.
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33 of 37 people (89%) found this review helpful
1 person found this review funny
34.5 hrs on record
Posted: August 8, 2014
My original review was fairly critical of this game due to the controls. Within a short period of me posting my review the developer personally responded to my criticism, thanked me, and then a week later released a patch that addressed the vast majority of my complaints.

Seriously, at this point I'm incredibly impressed. The game is quite fun and the developer clearly cares about their product.


This game is pretty solid, even with the little bit that I have played. At this point I am really wishing I would have bought this on iOS or Android though because the PC ports has some issues with the controls that leave me feeling frustrated because I feel like I am playing on a touch screen but I am forced to use a mouse as an intermediary. So much standard PC game design convention is thrown out the window just to make this a fast port.

1) Everything is accomplished via left-click, including moving your hero. Let's face it, the standard PC control for moving your hero from point A to point B is to right click.
2) The battlefield camera is incredibly myopic and should be able to zoom out a bit farther on larger screens.
3) The battlefield camera doesn't auto detect your mouse position and start scrolling the screen over when you mouse gets to the edge of the screen. Instead you must left-click on an empty area of the map and then drag the screen over as if you were using a touch screen tablet.
4) The scroll wheel does nothing useful. If it isn't going to zoom in and out very much, It should probably be set up to scroll through your heros in the same way as the tab key does instead.
5) When you have a special ability queued up your cursor doesn't give any indication that you are in that context. If you're activating a special ability and are moving the mouse we tend to expect our cursors to reflect what is about to happen when we click.

As I said before, I really like this game. On mobile I would really, really enjoy it. Unfortunately the PC controls are just nothing more than a sloppy port from a mobile game. I'll tolerate the annoying PC controls because I'm enjoying it regardless
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23 of 24 people (96%) found this review helpful
1 person found this review funny
2.5 hrs on record
Posted: December 26, 2014
Tower Defense is one of my favorite genres, and this is one of the best TD games on steam.

To start It has tight controls, and a smart hotkey layout. I found this to be the main problem with most of the tower defense games I have tried so far.

The only issue I have with the game is that tower placement is restricted to pre determined areas, this lowers the difficulty of the game and the strategic aspect. However as you progress further It becomes less of an issue as the maps become bigger.

I would rate the game 8/10
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22 of 23 people (96%) found this review helpful
60.5 hrs on record
Posted: October 27, 2015
If you like tower defence games, you will love this one!
Just keep in mind that difficulty is increasing significantly with each level, so every round is a new challenge.
Your super dooper troops, which were once able to reduce enemy forces to dust, will be wiped out unless you bring them more upgrades.
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40 of 58 people (69%) found this review helpful
3 people found this review funny
2.1 hrs on record
Posted: February 16, 2015
***Written using a key provided by the Developer for review purposes***

OTTTD (Over The Top Tower Defense) is a tower defense/RTS game with RPG elements. In OTTTD you assume the role of a HEROCORP™ commander who is waging war in another universe for lots and lots of money. This universe has some pretty crazy creatures roaming around in a couple of different areas and you'll fight them over the course of 25 missions.

+Nice design and cartoony art style
+Great soundtrack
+Good camera controls
+Lots of gore (the amount of gore can be changed) and gore, as well as shell casings, stay on the map for a long time before disappearing
+You get characters to fight on the ground who have special abilities and have skill trees to unlock more abilites, skill points are awarded each time a character levels up after a mission
+Good voice acting
+Variety of unique, and some not so unique, enemies
+Four different basic towers, each with two main upgrade ranks and a specialisation
+Has some really funny lines in it
+It's very challenging without feeling too difficult
+You can buy weapon and armour upgrades for your units
+Each of the twenty-five missions has a story mode as well as an endless mode

-Towers can only be built at predefined locations which takes away some of the fun of figuring out what tower is best where
-There's no collisions between enemy units so faster units move straight through slower ones rather than stacking
-Weapon and armour upgrades are extremely expensive
-There's only three different environments for the twenty-five missions


Despite its imperfections this is a great TD and a must have for all TD fans.

El K.
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20 of 25 people (80%) found this review helpful
1 person found this review funny
13.4 hrs on record
Posted: August 8, 2014
Fun, thoroughly enjoyable game, but doesn't feel quite right on PC.

OTTTD is mainly a tower defence/rts/rpg hybrid. You build your towers in fixed spots, level up and unlock abilities for your characters, then mess up a bunch of enemies.

First the positive. It is a very quirky, characterful game. I've smirked on a number of occasions when the next bad guy starts walking down the paths. If undead teddy bears, giant flying shark fortresses, and 'shanktopuses' are your thing, then get this game!
Music and sound effects are good, as is the voice acting. Didn't turn me off or make me cringe, which as a sound designer myself, is a really good thing.
The whole atmosphere is great, and whoever wrote all the little jokes on the items/upgrades/achievements needs a pat on the back.
And of course, gameplay is smooth, easy to get the hang of, and quite intense in the later stages.

So, it all sounds really good, right? Well it's important to know that this is technically a port of a mobile game. I was aware when I bought this, and it certainly shows, but it's not necessarily a bad thing...in places.
For example, it is easy enough to get coins and medals (the respective currencies) in game, and the option for microtransactions is absent (or at least, I couldn't see it). This is obviously a big thumbs up, although it makes the fancypants versions for sale kind of obsolete unless you're into the extras.
However, when a character dies, you have a time limit before you can use them again. You can speed this up at the cost of a medal. To be honest, I wasn't that bothered by it initially, as earning medals is easy, but that changed once I unlocked the first endless level. If your characters die, they gain 0 experience AND you have to wait for them to revive. Getting no exp from a 15+ wave run is one thing, but then having to wait 45 minutes (without using a medal) to revive is another. Not cool.
NOTE: After playing it a little longer, this no longer becomes an issue, as you'll have a huge surplus of medals.

Another example would be that, in order to pan across the stage, you actually have to click and drag, like using your finger on a tablet. Not a bad thing, but I'm more used to the rts-esque camera-follows-the-mouse deal.
There's also little in the way of settings customisation, although if you bought this game with that in mind, then I don't know what you expected.
A lot of these small things constantly remind me that it's a mobile port. Too many control/mechanic decisions feel a little foreign to the keyboard and mouse. It's unfortunate that these small issues glares over an otherwise fantastic game, because I've thoroughly enjoyed every moment of the actual gameplay.

If you can accept that, then you should definitely check this out. Definitely worth the current price (the standard edition anyway).
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22 of 30 people (73%) found this review helpful
Not Recommended
25.7 hrs on record
Posted: May 28, 2015
+ Awesome/fun voice acting: they are based on popular recognizable characters
+ goofy art style
+ Heroes are very different from each other
+ skill tree has fun and different options for each hero
+ 3 defined ways to attack and defend. Simple and fun
+ short battles
+ lots of heroes
+ heroes can die and you have to pay a small toll to revive them or wait 40 minutes. It forces you to try different heroes

+- preselected places for turrets. If it is well done, both approaches can work. I much rather selecting the locations by myself tho

- The way to pass certain levels (after the middle of the game more or less) is leveling up your characters. No strat or micro is going to work. The game want you to repeat the same level over and over until you are strong enough. This is the main CON. Without it I would had probably recommended this game. Leveling up is fun when is not the objective of the game.

- you CANT really try different characters for different approaches to the levels. Leveling up is too important and is a very slow process once you reach level ~20. You cant really progress with heroes under level 20 after the middle of the game.
- skills trees are completely arbitrary and you have to spend skill points just to find out if the random box in the top of a column is worth it.
- shortage of skill tree points to spend. They come from leveling up.
- no way to fast forward. The money you get from sending the next wave in when is possible is negligible
- no really level description. You have to suffer it at least once to know what is going to happen. In the first levels you can resell and readjust your gameplay during the game sucessfully if you feel something is not working out... this is not possible any more after a while
- Its a phone port and it shows:
-- when you select a hero, the screen centers in the hero. You cant really micro.
-- wheel mouse is very slow
-- you cant rebind keys
-- you cant click in the same spot twice for movement (ex. select 2 heroes to go to the same place). You have to click to a slightly different point. There a few positions that the hero outright refuses to go to without an apparent reason.
-- sloppy path algorithm for hero movement in general and sloppy selection.
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10 of 10 people (100%) found this review helpful
1 person found this review funny
67.7 hrs on record
Posted: December 15, 2014
10/10. This is tower defense done right. I have nearly every tower defense game on steam. It's my favorite game genre. I just played through the whole campaign of OTTTD, and it was the most fun I've had playing tower defense in a long time! I've already started replaying maps just for the fun of it. There's also Endless mode.

OTTTD is an excellent mix of TD, RTS group tactical play, with the leveling elements of RPG. You have all of the classic tower types, plus you have several characters, and you can bring three of them onto the battlefield and control their movements and their special attacks. Each character is unique. The whole game is unique, with a style all its own, while still feeling like a classic tower defense game with lots of extras.

Everything is extremely well-balanced. The maps are challenging, yet certainly doable if you make wise choices with your characters and towers. Each character brings something different, and some of their abilities play off of each other and the towers. There is a lot of variety in the maps. Some characters are more useful on some maps than others, and some work better in certain group combinations than others.

There's a lot of high quality game here for the money, especially with Endless mode.
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