MILLIONS OF ALIENS WILL DIE!Radiant Defense is a tower defense game set in a vibrant universe invaded by countless alien hordes.Build your space fortress any way you wish, set up wide variety of weapons and traps and let the invasions begin!
User reviews:
Positive (45 reviews) - 80% of the 45 user reviews for this game are positive.
Release Date: Jul 11, 2014

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About This Game


Radiant Defense is a tower defense game set in a vibrant universe invaded by countless alien hordes.

Build your space fortress any way you wish, set up wide variety of weapons and traps and let the invasions begin!

REROUTE AND REBUILD Use modules to shape the alien route. Bend the path so it always leads enemies toward your cannons and keeps them within the range of your energy weapons for as long as possible.

LET THEM BURN Use Typhon Fury Flamer to set passing enemies on fire and to quickly incinerate large groups of smaller units.

BOMBARD THEM Use Seraphim Missile Launcher to deliver target-seeking ordnance over great distances. Seraphim Missiles explode violently upon contact.

SLICE THROUGH Power Blades cut passing enemies and quickly remove their forceshields. Great at softening up enemy masses and terminating wounded runners.

LIGHT THEM UP Use Brightmark Searchlight to multiply the power of your defenses. Marked targets receive up to 200% damage from other weapons.

ANNIHILATE Target your Omega Cannon at any spot and disintegrate all that's passing through. Combines great with Recuperator and Brightmark Searchlight.

BLOW THEM UP Place Proximity Mines to explode enemy crowds or to damage heavily armored units. Mines can be placed anytime to quickly mend a critical situation.

WATCH THEM TREMBLE Psionic ocular terrifies all enemies, making them easy prey for your weapons. Combines best with superweapons such as the Omega Cannon.

DOUBLE THE PAYBACK Collect twice the money for nearby alien kills with Recuperators. Combines best with area specific weapons, such as Proximity Mines and Omega Cannon.

Radiant Defense Strategy Guide Read more on how to build a strong economy and get the maximum out of your deadly arsenal. Exterminate aliens with ease!


  • More than 300 waves of aliens across 14 missions
  • 9 upgradable weapons to kill the aliens with style
  • 3 superweapons of mass defense
  • Steam Leaderboards and Achievements
  • Use Alt+Enter to switch between Fullscreen and Windowed mode

Support and Feedback

Please contact with any inquiry or feedback.

Follow @hexage for the latest development updates and news.

System Requirements

    • OS: Windows 7
    • Processor: 2 GHz Dual Core
    • Memory: 2 GB RAM
    • Graphics: NVIDIA GeForce 6800
    • DirectX: Version 9.0c
    • Storage: 1 GB available space
    • Sound Card: DirectX compatible sound card
Customer reviews
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Positive (45 reviews)
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33 reviews match the filters above ( Mostly Positive)
Most Helpful Reviews  Overall
29 of 37 people (78%) found this review helpful
18.8 hrs on record
Posted: July 11, 2014
Favorite mobile TD finally arrived on PC!! *Version WITHOUT in-game store!*

I am consider this game as a 10/10 perfect experience, even after I already played it for over 30+ hours on my Android tab. The soundtrack is a mix of catchy space and lounge tracks and the graphics are beautiful coloured 2D animations.

Played a lot of Tower Defense games which were simple windowed *.exe files (Grassland TD) or more complexe ones (Revenge of the Titans) but this here is my absolute favorite TD game.

By spending the five bucks, you will get a game without a ♥♥♥♥♥♥ in-game store (Yes, I look at you Ubisoft!).
I prefer games, where you can pay a price and get everything in it, instead of trying to win by paying cash

Good move, Hexage! And now give us Radiant HD with Controller support (*_*)
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12 of 13 people (92%) found this review helpful
4.3 hrs on record
Posted: August 10, 2015
Vibrant colors, good music and cute aliens to battle in the cosmos. I love this game. Its sure to win any tower defense lovers heart. Its very forgiving with check points for each wave you go through. I appreciate that. Plus theres light humor along with a small story to follow, Very casual and fun. 10/10
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14 of 18 people (78%) found this review helpful
14.7 hrs on record
Posted: July 14, 2014
If you enjoy tower defense games, this is a must. Yes, it's a bit difficult but that's part of what makes it so fun. When you figure out what path the aliens should follow, what the best weapons are to slaughter them, and where best to place everything. After working hard to get a winning combo and you kick some serious alien butt - well, you just feel really satisfied. This is one of those "don't start playing anywhere near bedtime" games. :D
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26 of 43 people (60%) found this review helpful
Not Recommended
8.9 hrs on record
Posted: August 7, 2014
The difficulty people are talking about is not due to clever design but due to annoying 'features' (bad design). For example you can run a wave once and be unsuccessful, and run it a second time (with the exact same setup) and be successful. It's seemingly random.

It often depends on the direction your towers are facing when you start a wave, because they take sooo long to turn around and face the enemy.

Another design flaw is badly tiered difficulty of waves. For example on level 7, waves 1-10 are easy and can be beaten with 3-4 towers. Suddenly waves 11 and 12 are next to impossible, even if you've been saving the max resources per round. Now all of a sudden you need 6-7 towers just to barely scrape by. There was no preparation for this. Another example is often when you do scrape by those difficult waves, the next 8-10 waves will be super easy enemies that you faced earlier in the level. It jsut doesn't make sense.

The dificulty doesn't ramp up like it should: easy medium hard insane. Instead it spikes randomly in waves: easy easy easy HARD easy easy INSANE, etc.

Like other people said the controls are clunky. It's not a problem during the setup rounds between waves, but mid wave it's harder than it should be to set up a tower.

There's no backspace function like in Defense Grid. You cannot 'Undo' tower placements without selling them for a loss. 1 mistake can cost you the mission and you have to restart, making it very difficult to optimize your bases. This gets frustrating since the levels are SO long (45 waves at level 7).

Note to the designers: Do 10 waves WELL, instead of 45 waves SLOPPILY. It's just annoying how many hours it can take to finish 1 mission after you do get it on lockdown.

Another problem is enemies can walk off the screen, so you can't even see them. The map does not scroll.

For all of these reasons, the difficulty of the game is due to Design Flaws and Not clever design. I cannot recommend this game.
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5 of 5 people (100%) found this review helpful
121.0 hrs on record
Posted: June 20
Warning: This is Only for the TD powerplayer and perfectionist. Fun to play, but horribly unbalanced and requiring ludicrously narrow and complex winning strategies. Some levels are so exacting, if you dont follow a ridig set of build & upgrade paterns (that require many hours of trial and error to figure out) the level is essentially impossible to complete.
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1 of 1 people (100%) found this review helpful
11.8 hrs on record
Posted: July 2, 2015
Some usability and UI issues keep this game from being great. You need too many mouse clicks for some basic actions, and lacks feedback on some others, keyboard shortcuts also seem to be absent, I guess it's the legacy a game ported from touch based mobile platforms.

Other than that its an excellent Tower Defense type of game, addictive gameplay, some light humor and above all beautifully design graphics with a glowy tron-like art style and amusingly cute characters.
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1 of 1 people (100%) found this review helpful
8.9 hrs on record
Posted: July 14, 2015
An excellently made, wonderfully performing tower-defence title. Very funny writing and a good story makes this game all the better, my only gripe being with enemies a little too strong, and slowdown if you mass flamethrowers/acid. Other than that, this is an excellent title to pick up if you like well-designed tower defence games
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5 of 9 people (56%) found this review helpful
4.0 hrs on record
Posted: July 12, 2014
Ok lets be honest here. This is a great tower defense and it's great that it's on PC and it's great that it's so damn cheap! Just know before you buy that it's a pretty bare bones port. From my limited experience with the android version the PC version is identical, which is fine. I'm not gonna complain, it's five ♥♥♥♥ing dollars!

It's just that the interface ends up feeling a little awkward. You have to do a lot of clicking. The most annoying result of the port being that in order to figure out what a tower was I had to click it first. Right click to return or cancel would have been a nice addition, but instead you have to click a cancel button. Or click a build button, then click where you want it, then click again, then click your heels together. Just a hell of a lot of left clicking, you understand? No right mouse, no keyboard shortcuts, no graphics options, in fact the options menu if i remember correctly just has volume sliders.

But what do you want? It's radiant defense and it's five bucks. Go buy it, it's worth it. Just don't be disappointed by how tablet-ey it feels. It's worth it still.
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1 of 2 people (50%) found this review helpful
2.5 hrs on record
Posted: June 8, 2015
Thumbs up! Great defence game indeed. I'm a huge fan of defence type games. And this one is great. There's lots of action and upgrades, challenging, has a tutorial, (not all games do) so that's a plus. I recommend this game. :D
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1 of 2 people (50%) found this review helpful
10.6 hrs on record
Posted: November 14, 2014
Fun stuff. I love the rich artwork.
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Recently Posted
9.3 hrs
Posted: September 30
Superb game with quality graphics, enemies and weapons. The only downside is the number of playable maps (or missions), isn't that challenging for the most part. Please do a part 2 with co-op multiplayer.
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2.4 hrs
Posted: June 23
Helpful? Yes No Funny
-=G.O.D.S=- SteelHorn
14.2 hrs
Posted: March 18
I love Tower Defence Games and this was the smoothist flowing Graphics ever. Many TD games are flicky sprites, but the simple almost a vector animation type Radiant uses are pleasing to the eye. Sounds are pleasant too. Good learning curve. I got this the free version on my phone , I liked it so much i got the updates plus the weapons that come with that. It was worth it. I think here you get the whole thing. I bought it on steam here also. I do wish it had another 100 levels but hey, heres hoping i see a Radient 2 soon.
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36.2 hrs
Posted: March 3
Very meh

Baroque as a Joke's review pretty much says it all. A comment on the review also adds that it was a free mobile app with easy wave, easy wave, impossible wave - just to get people to pay for extra content (which apparently is all present in the Steam version).

I can't be bothered to fact check that though or even tell you what that content is. In fact, I can't even be bothered to think of anything witty to say about this game. Those furry yeti looking things would make comfy merchandise pillows I guess.
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4.9 hrs
Posted: January 22
Agree with other reviews that this game is too difficult. I've played loads of Tower games that provided a challenge but were beatable with a quick re-think of my strategy for that particular wave of enermies. With this game, it feels like if you don't start putting down the perfect sequence of towers from Wave 1, you're doomed to fail by mid-level, and the wave reset won't help because you won't have enough resources to build what you need to. Everything else about the game, i.e. music, graphics, choice of towers etc is great.

I'm all for a challenge but this is just frustrating, and I gave up.
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