Sentinels is a tower defense game lovingly spliced with a first person shooter. Deploy automated and manually activated defenses, then jump into the fray yourself with first person weaponry to decimate the relentless hordes of baddies!
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Release Date: Feb 17, 2017

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Want to help us build a cool action tower defense game by shooting bad guys in the face? Let's do this!
Sentinels has years of development behind it and is nearly feature complete, but there is still much work to be done. Early Access, for a truly indie developer, is simply the best way to get feedback and support while staying focused on building a great game.”

Approximately how long will this game be in Early Access?

“Planning on releasing end of 2017, but best answer is it’ll be released when it’s done, and not a second sooner.”

How is the full version planned to differ from the Early Access version?

“More levels, more structures to build, more loot mods, more enemies and a good single player campaign that introduces the mechanics smoothly. There are also some experimental additional game modes that will likely be added and will make it into final release if they test well.

And, of course, a few metric tons of polish.”

What is the current state of the Early Access version?

“The game has been stable in our tests, and framerate is good on desktop gaming rigs, but there have been reported issues with laptops. There are about half the number of levels intended for release, but there are multiple challenges for each level, so there’s a good amount of variety right now. The difficulty might be a bit high right now... but you like a real challenge, don't ya?

Oh, and there are bugs... that's the exciting metagame we added just for Early Access players!”

Will the game be priced differently during and after Early Access?

“Yes, early access players are receiving a discount (as well as 7 karma points and a virtual hug). It will likely go up about 20% before release.”

How are you planning on involving the Community in your development process?

“While we have a tiny team, we’ll stay tuned to the forums and do our best to respond to and evaluate feedback, and never miss those awesome ideas community members can bring to the table. There are some additional development tools that will be active in the game for early access players, helping them contribute easier, if they wish.”
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Recent updates View all (13)

March 19

New Build

Built on 3/18/2017

Added global energy bar support. I made this default for now, but the effort is to try to move to a bit more of a simpler method for handling energy that keeps players from having to pay much attention to the individual commander energy levels, but rather deal with the one global energy bar. The older system can be enabled in options, as I’m not completely sold on the newer system.

Added option to put micro structures in build menu. Made default.
Added option to put supply elements in build menu. Made default.
Added option to add commander specials to build menu. Made default.
Added option to cull supply items with count of 0. Made default.
Fix for inventory items not being saved correctly.
Fix for mods are not combining in inventory.
Remove item power clamping and adjust gear level display.
Made sure if only 2 structures are available, selecting one for tier 2/primary will swap them.
Clamped item quality to encounter quality when config locked.
Added some high velocity dampening so high force hits don’t send light weight things off level.

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March 13

New Build

Built on 3/14/2017

Oh boy, lots of stuff in this one…

Made slow and medium speed units faster.
Made difficulty level more of a factor for creep speed, now increasing difficulty levels significantly increase creep speeds.
Added new level Dual Strike, this level is a bit hectic, and will take some time to tune.
Added support for WASD control when building.
No longer cancels structure build if panning with right click.
Add major unlock rewards system to player level, which will eventually have alot of cool content in it :).
Removed crew rank, so it is no longer required for upgrading structures. It’s now a developer mode option, but until there are mechanics in place that make it more interesting, I’m leaving it disabled.
Modifications (hopefully improvements) to Into the Pit.
Changed default color of commander weapons.
Ecosystem fixes and visual adjustments for terrain.
Added new icons for path display.
Added option to enable forward rendering, and added it as a default for lowest graphics setting.
Shader optimization by creating multiple quality levels.
Lots of improvements for encounter complete dialog.
Many other UI improvements and fixes.

Few more fixes today with updated beta build…
Cleanup for skipping dialog with key presses, and few UI input fixes.
More fixes for Into the Pit, as well as Quarry… but already dissatisfied with Quarry and have better ideas :).
Visualized difficulty locked loadout slots rather than eliminating them.
Improvements to NPC chat display and many other little UI things.

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About This Game

You like exciting FPS Shooters? You like Tower Defense? You like customizing weapons and turrets into your own personal killing machines? Then this game's for you.


Deploy automated and manually activated defenses to crush, pierce, burn, freeze and otherwise thoroughly decimate the relentless hordes of enemies. Jump into the fray yourself with powerful first person weapons like machine guns, shotguns, missile launchers, artillery… almost too many ways to humiliate your foes.

Still not enough ways to misbehave? You can customize loadouts with gear pillaged from your enemies, or rewarded from your heroic performance in the multiple missions offered for each level. Still need MORE? Fine, you can also also get modifications for your gear, increasing range, speed, and even force applied, just in case you wanna ram enemies into buildings - or each other. You can watch our level playthrough/tutorial here.


  • Build your defensive web with a variety of automated and manually activatable turrets.
  • Jump into the fray with powerful first person weaponry. Choose from grenade launchers, lockon missiles, machine guns - just to name a few.
  • Customizable mods bring more destructive additions to the table - with options like force, phasing, and armor piercing, the strategic possibilities are endless. Personalize your weapons and towers to the highest standards and take the baddies down with grace.
  • Defend an ever-expanding roster of levels - 10 maps are currently available, 7 which have multiple challenge and endless modes. At least 6 more levels are actively in the works.
  • Level up and increase your rank to unlock more weapons, mods, and other perks.
  • Face off against 5 powerful commanders, each with their own unique powers and buffs. From stealth to speed to heavy armor, you'll find yourself challenged every step of the way.
  • Early Access Special! All EA players can access developer mode. Should you choose to activate it, you'll be given incredible control of the game. Bump up strength, speed, and frequency of enemies if you like a challenge, or increase the commander ammo pool if you want more fps action. You can adjust pacing, as well as toggle various game modes as we move forward in development. You can use these tools to give us personalized feedback and perhaps see your personal changes implemented ingame. All of this and more is available - the power is in your hands.
  • Steam Trading cards are coming soon.

Still curious how it all fits together? Check out our post here... or just play and find out for yourself. :)

System Requirements

    • OS: Windows 7 or later
    • Processor: 2GHz dual core
    • Memory: 4 GB RAM
    • Graphics: nVidia GeForce GTX 260 or Radeon HD 4850
    • DirectX: Version 9.0c
    • Storage: 4 GB available space
    • OS: Windows 7 or later
    • Processor: 3GHz quad core
    • Memory: 4 GB RAM
    • Graphics: nVidia GeForce 560 or AMD HD 6870
    • DirectX: Version 9.0c
    • Storage: 4 GB available space
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