Ammossum

About this game

Latest news

• Announcements·3 Sept 2026Official

  Ammossum Releases September 28!

  Ammossum launches September 28!After years of development, the train is finally ready to leave the station. We've been working hard on the full version of the game, adding new weapons, items, railcars, characters, enemies, bosses, biomes, and much more.The full release will bring everything we've been building toward, and we can't wait for you to finally play it.See you aboard on September 28! 🚂
  Read full article on Community Announcements (West Guardian)

• Patch Notes·17 May 2026Official

  0.9.9.1 Update is here!

  Update 0.9.9.1 are here! Added French localizationAdded Portuguese localizationAdded Spanish localizationFixed an issue where enemies would get stuck in the bridge arenaFixed an issue where the second boss would die immediately after the first bossFixed a bug where the "Will" aspect would cause a hardlockEndless mode — performance improvements for late-game stages
  Read full article on Community Announcements (West Guardian)

• Patch Notes·8 May 2026Official

  On the Edge of Release: 0.9.9.0 Demo Update

  You can join the demo through our Steam page. For all the latest news about the game, you’re welcome to join our Discord community! Ammossum v.0.9.9.0First of all, thanks to everyone who participated in our previous playtests, the Steam Next Fest demo, and shared their feedback.We've reworked and added a lot of things — so let's check out what's new!Changes:New Railcars and Updated Economy BasicsThe supply drop system has been replaced with a new railcar-based economy.We've added 10 different economic railcars, each providing unique items or bonuses after every battle. You can purchase new eco railcars or earn them as quest rewards.This means you can now scale your economy more effectively — and the start of the game is smoother than ever! We've also added a new battle railcar — the Shooter.This railcar, along with the existing battle railcars, now comes in 4 different types — one for each projectile shape. That's 12 battle railcars in total!We've also made them more accessible than before, so you can now build your strategy around them and make them your main source of power on the train! New weapons and items, plus reworks of older ones We've reworked most of the items from the previous version!Early items now provide more bonuses when they're melted down. Mid-game items appear earlier and have more upgrades available.And the new battle railcars let you use more items at the same time — so now your builds can be crazier than ever! We've also added a ton of new liquids! Now you can boost your other items with them and create some truly powerful combinationsOther changes:The difference between characters is now clearer in gameplay. Each of them has a unique personal aspect and their own starting shop. You can try 5 of them during the demo!ENDLESS MODE!Many UI and UX improvementsA brand-new tutorial has been addedImproved gamepad experienceThe Hyena finally got its ability!The Bear boss now has more complex behaviorAnd there are plenty more improvements waiting for y...
  Read full article on Community Announcements (West Guardian)

• Community & Events·25 Feb 2026Official

  Ammossum is Joining Steam Next Fest!

  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!🕹️ About the GameAmmossum 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.🌟Demo Available NowFor Steam Next Fest, the latest demo is fully available and includes:More Playable HeroesEach opossum hero comes with unique stats and progression paths, offering diverse build strategies.Choose Your Route at Each Station9 different station types appear randomly. Resources, risk, and pacing are now fully in your hands.Railcars Can Now ShootComplete missions to unlock special cars, develop independent weapon chains, and even achieve near “auto-clearing” chaos.Challenge & Quest Systems AddedNew quest system and mini-games add depth and variety to every run.UI Overhaul, Controller Improvements & Localization UpdatesSmoother gameplay, clearer strategy layers, and a smoother roguelike experience overall.💓Feedback & SupportThe 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
  Read full article on Community Announcements (Yahaha Studios)

• Patch Notes·23 Feb 2026Official

  0.9.7.4 Update is here!

  Update 0.9.7.4 are here! Added French localization
  Read full article on Community Announcements (West Guardian)