Screenshots
Watch trailer on Steam ↗OSES
Hifire Game Studio · Published by Hifire Game Studio
Positive — 80% positive (10 reviews) · 12 achievements
Last updated 27 Sept 2026
OSES is a strategic post-apocalyptic shooter in which 3 characters fight by using different guns to survive the zombie hordes in various scenarios and game modes.
1 DLC available ↗Steam Workshop
£2.89
Lowest price we've ever recorded
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£2.89
Price history
3 Sept 2026Lowest: £2.89 · Highest: £2.898 Oct 2026
Action, Indie, Strategy · 2017 · More under £5 games
Explore a post-apocalyptic world where strategy and quick reflexes are key. Control OSES' trio of survivors, each armed with distinct guns, to outlast horde after horde of undead foes.
About this game
OSES is a post apocalyptic shooter with a strategic layer, positioning of the survivors is crucial to the completion of the objectives. Run, shoot and switch between characters to guarantee the safety of everyone.
OSES offers the switching character mechanic, making it a shooter with bits of strategy, in which you need to manage positioning and ammunition of each character. The game has a 7 scenario short campaign and 20 time challenge maps, do your best to complete them and use the credits you get in matches to buy better weapons, drone drops and hats!
Complete challenges in 4 game modes: escape, defense, food rush and boss battles. Each one has different playstyles.
Escape: Focused in agility and knowledge of the maps, the characters must escape to the firepits as fast as possible, solving simple puzzles on the way.
Defense: In this mode the characters must stop the zombies from destroying the energy generators and keep their weapons loaded, so that they are not surprised by the enemy.
Food rush: On food rush maps, all characters are starving to death and need to run around the map to collect food packages, trying to take the most of each one while stopping the zombies from infecting them.
Boss battle: Defeat the boss as fast as you can, while managing your ammunition and getting better weapons from boxes around the map.
Beyond the official maps, the game has the workshop integration, so that the players can create and share their own maps, or download those created by the community. The available tools allow the player to create maps on the 3 game modes, and even mix various game modes to create a new and challenging experience. It is also possible to create maps with focus on narrative.
OSES offers the switching character mechanic, making it a shooter with bits of strategy, in which you need to manage positioning and ammunition of each character. The game has a 7 scenario short campaign and 20 time challenge maps, do your best to complete them and use the credits you get in matches to buy better weapons, drone drops and hats!
Complete challenges in 4 game modes: escape, defense, food rush and boss battles. Each one has different playstyles.
Escape: Focused in agility and knowledge of the maps, the characters must escape to the firepits as fast as possible, solving simple puzzles on the way.
Defense: In this mode the characters must stop the zombies from destroying the energy generators and keep their weapons loaded, so that they are not surprised by the enemy.
Food rush: On food rush maps, all characters are starving to death and need to run around the map to collect food packages, trying to take the most of each one while stopping the zombies from infecting them.
Boss battle: Defeat the boss as fast as you can, while managing your ammunition and getting better weapons from boxes around the map.
Beyond the official maps, the game has the workshop integration, so that the players can create and share their own maps, or download those created by the community. The available tools allow the player to create maps on the 3 game modes, and even mix various game modes to create a new and challenging experience. It is also possible to create maps with focus on narrative.
System Requirements
Will my PC run this? →Minimum
Minimum:
- OS: 7 or newer
- Processor: Intel Dual Core or better with SSE2 support or equivalent AMD family
- Memory: 2 GB RAM
- DirectX: Version 9.0c
- Storage: 250 MB available space
- Sound Card: DirectX compatible
Supported Languages
English
Latest news
Patch NotesOfficial
OSES - Twin-stick Update!
A big update for OSES was just released! Here's what's new https://steamcdn-a.akamaihd.net/steamcommunity/public/images/clans/30594970/3bc71ec9bfc702ff53e04769e62554813dc44c49.png Controls revamp: New control modes allow for better and easier gameplay. Shoot in all directions using the Twin-stick mode! Move and aim smoothly with the Behind option! Play the classic way with 8 directions! Weapons balance Pistol and Assault rifle ammo capacity reduced! Laser gun has now an overheat mechanic, it will now requirea reload if you let its ammo count get to zero! New camera option allows you to configure the height of the camera. 4 new challenging maps, one for each gamemode. Some maps now have the sleeping zombies mechanic. Drone is now only available in generator defense Weapon drops are now more predictable. Multiple new sound effects. 3 new songs! 1 of them being exclusive to stealth gameplay Better menu flow. Added new options that allow for customization of the UI. Fixed some issues with the Leaderboards. Fixed minor bugs Have fun playing the update and please report any bug you find!Read full article on Community Announcements (Andrei)AnnouncementsOfficial
February 28th Fix
-Fixed known errors in campaign texts -Set the default control to Mouse Rot + camera behind, since this is the most used by players -Updated the tutorial to reflect the control changes and teach the player about the droneRead full article on Community Announcements (Andrei)Patch NotesOfficial
February 28th Fix
-Fixed known errors in campaign texts -Set the default control to Mouse Rot + camera behind, since this is the most used by players -Updated the tutorial to reflect the control changes and teach the player about the droneRead full article on Community Announcements (Andrei)Patch NotesOfficial
End of the year Update!
Hello Survivors! The game just had a quick small update! Here's the changes! Added 4 new Campaign maps! Added new commands with focus on narrative building. Bug fixes That's it for this year! Thank you for all players and i wish everyone a happy new year!Read full article on Community Announcements (Andrei)Patch NotesOfficial
End of the year Update!
Hello Survivors! The game just had a quick small update! Here's the changes! Added 4 new Campaign maps! Added new commands with focus on narrative building. Bug fixes That's it for this year! Thank you for all players and i wish everyone a happy new year!Read full article on Community Announcements (Andrei)
