Hi everyone — Ammossum is participating in Steam Next Fest from Feb 23 to Mar 2 (PT)!
We’d love for you to try the demo, and share it with friends who enjoy roguelikes and build experimentation!
Ammossum is a 3D action roguelike that blends deck building, third-person shooting, and train defense mechanics.
Play as a fearless opossum in the Wild West. In each run, you'll upgrade weapons, choose aspects and quests, enhance your train, and survive increasingly intense enemy waves.
Every choice shapes your route. Every run creates a new build.
For Steam Next Fest, the latest demo is fully available and includes:
More Playable Heroes
Each opossum hero comes with unique stats and progression paths, offering diverse build strategies.
Choose Your Route at Each Station
9 different station types appear randomly. Resources, risk, and pacing are now fully in your hands.
Railcars Can Now Shoot
Complete missions to unlock special cars, develop independent weapon chains, and even achieve near “auto-clearing” chaos.
Challenge & Quest Systems Added
New quest system and mini-games add depth and variety to every run.
UI Overhaul, Controller Improvements & Localization Updates
Smoother gameplay, clearer strategy layers, and a smoother roguelike experience overall.
The previous playtest version is now closed — please download the latest demo directly from our Steam page.
If you enjoy Ammossum, consider adding it to your wishlist and leaving feedback on the demo page — it truly helps us a lot.
Please leave a comment or join our Discord to share your feedback. We can't wait to see your wildest builds during Steam Next Fest!
West Glade