Single-player games like Ammossum
Below are 8 single-player Steam games similar to Ammossum, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Ammossum page.
Ranked picks
- 1
Rhyolite
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action and Indie with Ammossum.
Rhyolite throws your crew of up to 4 players into a pressure cooker of broken train mechanisms, complex enemy attacks, and an ever-shifting puzzle of resource and attention management as you capture ghosts on a haunted steampunk railway.
- 2
MAD TOYS
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action with Ammossum.
Mad Toys is a FPS set in a world of toys. Defend, manage, and upgrade your weapons to fend off the invading enemy forces. Battle through waves of enemies and face challenging boss fights to save the world.
- 3
Erosion
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action with Ammossum.
Your daughter's been kidnapped. Every death costs you a decade. Explore a roguelike open world where your actions reshape the timeline. Join a cult, steal a ride, gamble Cheddar. Collect 100+ weapons and abilities, demolish destructible voxel dungeons. Can you save her before time steals her away?
- 4
Roguebound Pirates
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action and Indie with Ammossum.
Loot, upgrade & dominate! Your inventory IS your ship in this action roguelike. Customize weapons, create game-breaking synergies, and claim your place as the most overpowered pirate across the seas!
- 5
Soulcery: Deck of Shadows
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action and Indie with Ammossum.
An action roguelike fused with deck-building combat. Steal enemy abilities to shape your battle deck and unleash relentless, zero-cooldown combos.
- 6
Umbra Survivors
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action and Indie with Ammossum.
The first 3D Gothic Survivors-like on Steam. Thousands of enemies. One survivor. No mercy. Fight through endless hordes, roll rare card upgrades and forge broken builds. Every level-up can change your entire run. Multiple playable characters. Epic bosses. Seasonal events.
- 7
VOID/BREAKER
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action and Indie with Ammossum.
Fast paced Bullet hell Roguelite FPS 🔴 Fight relentless machines driven by a hostile AI. Escape an endless cycle. Craft infinite weapon variants with deep gun modding. Forge deadly synergies. Carve your way out through enviro destruction /BREAK THE SYSTEM /BREAK FREE
- 8
Apocalypse Express
Single-player alternative to Ammossum — playable solo, no multiplayer required. Shares Action and Indie with Ammossum.
Conduct, upgrade and repair your train through endless waves of enemies in a post-apocalyptic setting. In this action management roguelike, the player decides to embark on a journey through the wasteland looking to fulfill the dream of seeing the remains of the outside world.