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Calcium Contract
#2427960Calcium 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.
Recommendation
ProtonPerfect
StaleLow confidence
Only Proton reports exist so far.
Last report Aug 13, 2025
Compatibility
Proton
Perfect
StaleLow confidence
3 reports · Low confidence: very few recent reports yet.
NativeNone
No native Linux build — Proton only
Anti-cheatUnknown
No anti-cheat reports yet
Reports(3)
Most of this is historical ProtonDB data (newest from Aug 13, 2025) and needs a fresh report to confirm it still holds.
Add a fresh reportShowing 3 of 3 reports
- PerfectProtonDesktopHistoricalAug 13, 2025
- GreatProtonDesktopHistoricalOct 20, 2023
- GreatProtonDesktopHistoricalOct 14, 2023
End of reports