
Screenshots

Watch trailer on Steam ↗Calcium Contract
Igor Aleksandrowicz · Published by Igor Aleksandrowicz
Content notice: The game contains humanoid non-human enemies which can be killed. They bleed and fall down when they die, but it's depicted in a rather cartoony way.
Very Positive — 93% positive (150 reviews) · 30 achievements
Last updated 27 Sept 2026
Calcium Contract is a fast-paced first-person shooter where you're on a mission to finish a contract that got out of hand. Learn to swiftly move around your enemies and master your arsenal as you fight your way toward the grand finale. Includes a unique score-attack mode in ever-changing arenas.
£8.50
Lowest price we've ever recorded
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Price history
Action, Indie · 2023 · More £5 - £15 games
Embark on high-stakes missions as you navigate treacherous environments, mastering diverse weapons to complete contracts. Calcium Contract challenges players with its dynamic score-attack mode across ever-changing arenas.
About this game

"All that lives must die". This ancient law has been successfully enacted by the Calcium Order for millennia. Until now. A strange serpentine creature refused, took hold of an island, and has been repelling the Order's agents rather successfully.
You have been summoned and contracted by the Order to solve the problem. You take your scythe and get on a boat.
- A game that takes inspiration from fast-paced FPS classics from the '90s, but moves from there in its own slightly weird direction.
- Fight through over 20 levels climbing the island's mountain to get to the lair of your contract target.
- You have the unique weapons of the Calcium Order at your disposal. You'll find them somewhat familiar yet a bit otherworldly in form and function.
- Learn your enemies' behaviors and use that knowledge in your deadly dance. Be warned, as some enemies can manipulate others to throw you off guard.
- Mistakes happen. You can conveniently rewind time to any earlier point of the level or just jump back to a few seconds before your death.
Eternal Harvest
Eternal Harvest is a unique score-attack game mode in ever-changing procedural levels. It's a completely new and super fun way of enjoying Calcium Contract!
- Fight your way through procedurally generated levels that rebuild themselves as you play!
- Avoid or deliberately seek out Eternal Harvest curses. They increase your score but make the game harder in various quirky ways.
- Compare your score to your friends and other players in the leaderboards.
- Participate in daily challenges. A new challenge every day, but you only have one try!
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit or later
- Processor: 2.5 GHz
- Memory: 2 GB RAM
- Graphics: Directx 11 support
- DirectX: Version 11
- Storage: 300 MB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
Patch 1.1.11
- Leaderboard names with non-latin characters are now shown in a better way - Campaign story text fixRead full article on Community Announcements (Igor Aleksandrowicz)Patch NotesOfficial
Patch 1.1.10
Fixed a gamepad issue with sticks not starting from 0 speed when moving out of the dead zoneRead full article on Community Announcements (Igor Aleksandrowicz)AnnouncementsOfficial
Simplified Chinese localization
Calcium Contract is now Available in Simplified Chinese! Localization by ComputerEngineRead full article on Community Announcements (Igor Aleksandrowicz)Patch NotesOfficial
Patch 1.1.8
Gamepad fixes and improvements: - The movement speed is now analog - The gamepad acceleration setting should work more intuitively now. You might want to tweak it if it feels off after the updateRead full article on Community Announcements (Igor Aleksandrowicz)AnnouncementsOfficial
New languages
Calcium Contract is now available in 5 new languages: French, Italian, German, Spanish and Brazilian Portugese!Read full article on Community Announcements (Igor Aleksandrowicz)






