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Hostile Mars is a Tower-Defense Factory-Building game. You must create efficient supply chains, salvage destroyed enemies, and upgrade structures to support your gigantic cannons that defend your base against thousands of enemies.


Upgrade everything to a ridiculous degree. Laser turrets come in sizes 1, 2, 3, or 120.


Enemy drones pour over the hills and tower above you. You will need every upgrade you can get to defend against them.


You don’t have time to defend your base and acquire supplies!

Instead, create supply lines by automating hundreds of delivery bots to harvest ore and resupply your base.


  • Upgrade your traps to deal more damage, collect materials that fall from defeated enemies, and tons of other crazy stuff.
  • Upgrade your turrets to shoot farther and hit harder!
  • Upgrade your base to unlock new items.
  • Upgrade walls, guns, ammo, delivery bots, harvesters, machines, buildings, storage, and more!
  • Strategically place walls, traps, and turrets to create a defense strong enough to keep your home base energy core protected.
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Hostile Mars DevLog 03 Cover mi

Another productive week and another devlog!

The past week has been spent on implementing an IK (Inverse Kinematics) system using a data-oriented approach. All of the enemies are entities instead of traditional game objects, which allows for a crazy amount of enemies both active and on-screen simultaneously!

The only problem with this is that most of the systems that were in place need to be rewritten to work with Unity DOTS.

DOTS is Unity's version of Data-Oriented Design and it has shown incredible performance improvements.

It isn't necessarily the best task to show off, since the IK is relatively the same as it was before, but it is nice to have out of the way. It is one of the last things that needed to be converted over to DOTS.

A few other things that have been completed in the last week:

Yes, some forms of moss are beginning to be engineered to stay alive, even thrive, on Mars. These are not traditional rooted plants, but lichens and bryophytes:

Hostile Mars Bots and Moss f

New Enemies
They might seem friendly, but then why would they have a laser cannon for a face?

Hostile Mars Walker Bots 2 min

Laser Trap
An updated laser trap:

Hostile Mars Laser Trap min

With a new shader!

Hostile Mars Laser Trap Shader

That's it for this week, another update each and every week! Also, I am posting a development roadmap this week on the Steam page.

Take care,

Hostile Mars Devlog #02

Hostile Mars Devlog #02


Development Update Highlights: Parted Enemies, Force Trap, and other New Models!

Devlog #01

Devlog #01


Development Update Highlights: New Models! Command Center, Refinery, Drill, Power Distributor, and more. New Features Implemented: Salvageable Items...

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Hostile Mars
Developer & Publisher
Big Rook Games
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Single Player

Latest tweets from @bigrookgames

Hostile Mars Devlog Update 03: Plants! (Lichens and Bryophytes), Laser Traps, New Robot Textures, and Data-Oriented… T.co

Feb 28 2021

New "Push Trap" that pushes attacking enemies into other traps and/or causes fall damage. Hate the name push/force/… T.co

Feb 20 2021

The past week has been mostly focused on enemies and traps. A few remaining buildings were finished and then clean… T.co

Feb 20 2021

Prototyping with randomized segment procedural animation for a herd of little robot walkers for the Robot Wildlife… T.co

Feb 18 2021

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Hostile Mars
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