Marrowsteel
Demo available
About the game
Assemble every turret from parts — barrel, ammo, magazine, a second gun on the mount — and hold the last line against a biomechanical swarm hundreds strong. Swap modules mid-battle as the swarm changes. Roguelite runs, bosses, a research tree.
Original Steam description
HOLD THE LINE
Behind you — the last human cities. In front of you — a swarm that never stops.
A LIVING SWARM
Hundreds of biomechanical horrors surge forward as one living mass to tear through your defenses — so where a tower stands matters as much as how it's built. And bosses change the fight: the first one walks in under an energy dome that shields every bug around it.
MODULAR TOWERS
You can't buy the ultimate tower — you build it, module by module. Mount a heavy barrel, load armor-piercing rounds, strap a second gun to the mount. Every part changes how the tower fights, and every choice costs you somethin
FEATURES
Modular towers - every build is unique
Hundreds of enemies moving as one swarm
Bosses with their own mechanics
Roguelite runs
A persistent research tree that grows with the towers you play
You might enjoy Marrowsteel if you like...
Thronefall, Sir, We Have an Orc Problem, They Are Billions, Diplomacy is Not an Option.






Demo and release information
A Steam demo was found at the latest check. Confirm it is still available in your region on Steam before downloading.
Steam demo, playtest and Early Access: what is the difference?
Information & artwork: Steam · Last checked UTC