Released Sep 28, 2026 $12.99 Mixed Counts toward your Steam games

Ammossum

By West Glade · published by Yahaha Games

Roguelike Singleplayer Replay Value Action-Adventure Action Roguelike Physics Action Combat RogueliteGun CustomizationSide ScrollerDungeon Crawler

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Followers —

Reviews 104 Mixed

Players now 4 Peak today 4

Followers, 30 days — Not enough history yet

Ammossum is a game tagged Roguelike, Singleplayer and Replay Value by West Glade, released Sep 28, 2026. It has 104 Steam reviews (Mixed). The Steam games most like it include Randotura, Ogre Chambers 2222 and P.A.G. Post Apocalypse Guns.

Build an endlessly upgradable weapon! Evolve projectiles into unstoppable firepower in this action roguelike. Fight through hordes of infected beasts, hunt down the source of the plague, and feel the thrill of bloody shootouts filled with bullets, explosions, and acid. Can you survive the madness?

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<a href="https://launchrivals.com/games/2659600-ammossum"><img src="https://launchrivals.com/games/2659600/badge.png" alt="Ammossum launch date" width="320" height="84"></a>

<a href="https://launchrivals.com/games/2659600-ammossum"><img src="https://launchrivals.com/games/2659600/badge.png?theme=light" alt="Ammossum launch date" width="320" height="84"></a>

Randotura 65% match · Roguelike, Singleplayer, Replay Value
Ogre Chambers 2222 64% match · Roguelike, Singleplayer, Replay Value
P.A.G. Post Apocalypse Guns 64% match · Roguelike, Singleplayer, Action Roguelike
OmniGun 62% match · Roguelike, Action Roguelike, Physics
Phil 62% match · Roguelike, Singleplayer, Replay Value
Between Gods 60% match · Roguelike, Singleplayer, Replay Value
Elementum 60% match · Roguelike, Singleplayer, Replay Value
Steampunk Abyss 59% match · Roguelike, Singleplayer, Action Roguelike
Cats Kill Zombies 59% match · Roguelike, Singleplayer, Replay Value
Crank'N'Gun 59% match · Roguelike, Singleplayer, Action Roguelike

Steam data

Everything Steam lists for Ammossum · record updated 16 hours ago

Steam store

Overview

App ID2659600

Release dateSep 28, 2026

Last change number39951309

Last record update16 hours ago

App type: Game
Developer: West Glade
Publisher: Yahaha Games
Steam profile: Counts toward game count and achievement totals · checked 1 day ago
Technologies: Unity detected

Windows 64-bit

Steam Deck: Playable
Controller: Full support

Single-playerFull controller supportPlayStation controllersXbox controllersPlayStation controller BluetoothSteam CloudSteam AchievementsFamily Sharing

Prices

Price · US$12.99

On sale0 of 41regions right now

Lowest seen · US$12.99Oct 23, 2026

Checked10 hours agoin 41 regions

ColombiaCOL$COP

Every price change is kept from Oct 23, 2026 on. Pick a region below to compare.

Patches

Oct 16, 2026 1.0.0.91 Update
Update 1.0.0.91 are here! Big Stack achievements now correctly count chips of all levelsFixed an issue where enemy-kill achievements could sometimes stop progressingAdded minimum caps for enemy HP and movement speed
Oct 13, 2026 Hotfix update 1.0.0.9
Update — October 13Fixed an issue that could cause a hardlock on the first run. The issue primarily affected players using AMD hardware or Linux
Oct 10, 2026 Hotfix update 1.0.0.8
Update — October 10Fixes & ImprovementsFixed Crossbow behavior at the end of battles — its ability should now work correctlyFurther optimized projectile physicsAdded maximum caps to several stats to prevent crashes, excessive values, and o…
Oct 6, 2026 Update 1.0.0.7
Endless ModeUntil now, Endless Mode didn’t really give your craziest builds a chance to shine. We’ve reworked its difficulty curve — now the game will actually try to fight back and put even the wildest builds to the test! Important: Due t…
Oct 2, 2026 Hotfix update 1.0.0.6
Update — October 2BalanceCapped the maximum Mushroom Jellyfish radius. Don’t worry, Jellyfish fans — it’s still huge.UI & InventoryFixed an issue where quick smelting an item from the inventory could automatically switch to another pageDes…
Oct 1, 2026 1.0.0.54 Hotfix is here
Update 1.0.0.54 are here! Black Screen Issue Resolved (again!)
Oct 1, 2026 1.0.0.52 Hotfix is here
Update 1.0.0.52 are here! Black Screen Issue Resolved
Sep 30, 2026 Hotfix update 1.0.0.5
Update — September 30BalanceShortened the overall run length and rebalanced several progression segmentsEarly-game power-ups now arrive faster, each hero have a combat railcar in starting shopBosses now deal more damage, making skipped bos…
Sep 28, 2026 1.0.0.4 Hotfix is here
Update 1.0.0.4 are here! Mouse sensitivity has been reworked, as some players were experiencing inconsistent mouse movementRailcar sounds now work as intendedThe main menu music no longer changes after a run ends
May 17, 2026 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 f…
May 8, 2026 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 Ne…
Feb 23, 2026 0.9.7.4 Update is here!
Update 0.9.7.4 are here! Added French localization

Build	Branch	Updated
25981015	public	Oct 16, 2026

Depots

ID	Name	Systems	Size	Download	Manifest
2659601	—	All	268.5 MB	187.2 MB	8400275818973464448

Branch	Build	Updated	Access
public	25981015	Oct 16, 2026	Open

Configuration

Install foldersteamapps/common/Ammossum

Executable	Arguments	Systems	Description
Ammossum.exe		Windows · 64-bit

Space per player953.7 MB

Filesup to 5

Save locations1

Root	Path	Pattern	Systems
WinAppDataLocalLow	WestGlade/Ammossum	SaveData.json	All

News

Sep 28, 2026 · Community Announcements Ammossum is OUT NOW!
Ammossum is OUT NOW!After four years of development, Ammossum is finally out on Steam! It still feels a little strange to write that. We've spent years building, rebuilding, testing and polishing thi…
Sep 3, 2026 · Community Announcements 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, railcar…
Feb 25, 2026 · Community Announcements 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!🕹️ Abo…
Feb 11, 2026 · Community Announcements Time to change the route! 0.96 and open the demo
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.0.96First of all, thanks to everyone who participated in…

Data from public Steam pages, updated daily; 5 days of history. LaunchRivals is not affiliated with Valve or Steam.

Ammossum

About Ammossum

Steam data

Overview

App info

Platforms

Features

Prices

ColombiaCOL$COP

Americas 10

Europe 5

CIS 4

Asia-Pacific 15

Middle East & Africa 7

Patches

Patch notes

Builds

Depots

Depots

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Configuration

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Cloud saves

News