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The biggest installment of the award winning Sentinel sci-fi tower defense series now on PC! Take the fight to the alien homeworld and unleash a massive arsenal of weaponry. Get up close and personal on the battlefield in your power armor to execute devastating attacks and support your defenses! * An epic campaign across 20 levels.
Release Date: Nov 26, 2010
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Recent updates View all (2)

Campaign 2 and Achievements - Sentinel 3: Homeworld v. now live!

February 14th, 2014

A major Sentinel 3: Homeworld update is now live! Earn sweet, sweet achievements and embark on the massive Campaign 2, for free!

New content:
- Campaign 2, featuring 15 unique new maps in Campaign and Endless mode, new enemies and weapons, and the Aurora Commander mech.
- Steam achievements!
- General Steamworks integration.

- Fix stuck mouse click when moving mouse outside window.
- Fixed push and drag scroll methods fighting.
- Fixed level select jumping to level 1 if mouse is dragged when clicking play.
- Default mode is now windowed, no fullscreen on first launch.


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Sentinel 3: Homeworld Public Beta v1.1.0.1 now available

February 12th, 2014

A beta version of Sentinel 3: Homeworld is now available to all game owners. This update adds the Campaign 2 expansion pack to the game, plus Steamworks support and achievements.

To access the beta, right-click on Sentinel 3 in your Steam Library, select Properties, click the "Betas" tab, then opt in to beta. The update should start downloading immediately.

Please report any problems with the update in the forum, and enjoy the new content!

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About the Game

The biggest installment of the award winning Sentinel sci-fi tower defense series now on PC!
Take the fight to the alien homeworld and unleash a massive arsenal of weaponry. Get up close and personal on the battlefield in your power armor to execute devastating attacks and support your defenses!

* An epic campaign across 20 levels.
* A powerful commander unit which can level up and gain new abilities as you play.
* Over 20 unlockable turrets, orbital ship weapons, automated drones and abilities at your disposal.
* Customize your weapon loadout in the Armory to match the demands of the mission.
* NEW: Includes new content featuring new commander, enemies, campaign, weapons and more!
* Endless modes for all maps.
* NEW: Steam Achievements
* Classic mode allows you to compete for scores in a pure skill-based game mode.
* Exclusive music by Specimen A.

System Requirements

    • OS: Windows XP SP2, Windows Vista or Windows 7
    • Processor: 1.2GHz+ Processor
    • Memory: 1 GB RAM
    • Graphics: OpenGL 1.3 gfx card/driver with 128+MB Video Ram
    • Hard Drive: 300 MB available space
Helpful customer reviews
58 of 65 people (89%) found this review helpful
1,618 products in account
8 reviews
2.3 hrs on record
First things first:


I am sorry, but it is. This is exactly the mobile game, ported to PC without changing anything. It has no resolution options (and only a low/high quality setting, nothing else). It only runs in window mode or in a stretched (!) fullscreen mode. Really, really bad. I have a native resolution of 1920*1200, so why the hell can't I get this exact resolution in the game? Instead I get this ugly, stretched mess. But ok, I can live with it. Tower defense games were never about the graphics, right? The interface is exaxtly what I know from the iphone. They really didn't change a thing. For instance, if you drag a weapon to a free slot in the armory, it becomes zoomed in in your hand/mouse cursor, which makes sense on a mobile device. It looks horrible and ridiculous on a full HD display though. And they added absolutely nothing. No achievments, no trading cards, no nothing. I really have to assume, that the developers only wanted to make a quick buck with this.

Which is really a shame, because the game itself is actually great. It is exactly what i expect from a tower defense game. Looking at all the newer TD games which try to implement more interaction (like running around with a hero), this is rather old-school. And it is exactly how i like my TD games. Searech for optimal spots for your towers. Find the right balance between getting lots of interest each round and not dying. Love it! And the commander is a nice addition to the already great gameplay of its predecessors. It gives you a little bit of additional interaction, but not too much. For me personally the commander is about as much interaction (besides placing and upgrading towers) as I can take. Perfect!

I really like this game, and that's why it gets a thumbs up. I was really struggling though, because this port is basically a punch in the face of all Sentinel fans. I would have expected more. I pay more money for this than on the iphone after all, so I think i can expect more, right? Whatever, the game is still a lot of fun. If you like traditional tower defense games, this might be the game for you.
Posted: February 7th, 2014
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57 of 81 people (70%) found this review helpful
869 products in account
7 reviews
1.5 hrs on record
Solid, Simple, Tower Defense for fans of the genre. This is primarily a fixed path, but flexible tower placement game. Not a maze builder.

After about 30 minutes of play, it appears to just be a bug free, direct port, of the mobile version. That is not necessarily a bad thing. I already own the android version and have beaten it before. Too many mobile to PC ports are buggy right off the start. So far this works fine for me in either full screen or windowed mode. Thumbs up to a smooth mobile to PC transition for the Devs.

It’s a good addition for fans of the genre, especially if you don’t already have it on your tablet or phone. This is best for those that prefer a more 2D tower defense where you focus on upgrades and tower placement like Onslaught, Fieldrunners, iBomber Defense, or Defender’s Quest.

If you prefer a more complex fully 3D tower defense that uses more of the PC’s gaming power I’d recommend checking out Prime World: Defenders, Dungeon Defenders, Sanctum (1 or 2), or Defense Grid.

I enjoy both the simple 2D and complex 3D Tower Defense games. So I was more than happy to add Sentinel 3 to my Steam collection.
Posted: February 3rd, 2014
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27 of 32 people (84%) found this review helpful
310 products in account
3 reviews
16.2 hrs on record
This was a solid tower defense game on android. The Steam version suffers from being a lazy port. The controls haven't been properly reworked for PC, the slider where you select your mission is slightly bugged (clearly intended to be swiped with a finger and just badly ported over for mouse), and the graphics are poorly detailed when viewed on a normal sized computer monitor or TV.

I think if these guys had just put in a bit more effort, it could have been a good port. As it is for now, there are better tower defense games to be played instead.
Posted: February 8th, 2014
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1 of 2 people (50%) found this review helpful
990 products in account
49 reviews
10.8 hrs on record
A lot of people complain about games that are ports from other systems, but I can't say I have a problem with them so long as they are ported well. While this may be an phone app port, I have to say I'm really enjoying it. Personally I have more problems with console ports (due to poorly implemented keybinding options or only supporting the XBOX controller; Deadpool being a HUGE example of this) than phone app/flash ports, so this was a pleasant surprise when I found how much I'm enjoying a game that was originally a phone app. The only gripe I have about it is the fact that you have to click & drag the towers to the location you want to drop them to, which is a bit of an issue if you accidentally release the button & drop the tower somewhere you don't want to (luckily not all areas in a map are buildable). Other than that, I would probably give this game an overall rating of 8 out of 10. Music would be 9 out of 10, it lost a point for being somewhat repetitive (the music you hear in the trailer is exactly what you hear in the game).
Posted: March 3rd, 2014
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1 of 2 people (50%) found this review helpful
48 products in account
3 reviews
36.6 hrs on record
I have been playing TD games for quite a while, and I'm more "Selective" now with this genre... Said that I'm really enjoying this game

Scenarios with lots of waves... a Commander to level up.... and Maximized towers that really make a difference!
What else can I ask for in a TD game? ;)

Old-School graphics really don't bother me
Good price for hours of gameplay ;)
Posted: February 21st, 2014
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