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Calcium Chaos
Calcium Chaos is a casual Twin-Stick Roguelite that takes you on a journey by train to confront the necromancer and her skeleton army. Get ready to explore a world filled with crazy weapon combinations and unexpected allies as you embark on an epic quest to save the world!
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-26.
“i can see the love and passion put into this game but, i think that it fails short in terms of combat and just general interesting design”
— a player, Steam review · 2 hrs playedAchievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-09-26.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Updated Elites
Hey Skele-frens! We're rattling some bones with a fresh update just in time for the Nordic game sale. Packed with new visuals, fixes, and a few tweaks, this one's got plenty to chew on. Let’s break it
Update 1.1 is live!
Update 1.1 introduces Steam Cloud Save, fixes critical bugs, and enhances the quality of life of Calcium Chaos: Derailed. All Changes: Steam Cloud save: Steam Cloud save has been enabled for the main
Calcium Chaos: Derailed - OUT NOW!
Woohoo 🎉 We did it! Calcium Chaos: Derailed is out now! Get ready to defeat the evil necromancer, solo or with friends (using Steam Remote play). And end her terror by combining ordinary items to make
Launch Date Announcement
Hey Skelefrens! We are excited to announce that, after nearly four years of constant development, Calcium Chaos: Derailed will be available on November 8th (that's in exactly a month!!!) . Get ready t
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-26.
| Genres | Action, Adventure, Casual, Indie |
| Player tags | Twin Stick Shooter · Rogue-lite · Action-Adventure · Local Co-Op · Casual · Comedy · Cute · 2D · Top-Down · Action · Adventure · Controller (SteamSpy community voting) |
| Features | Single-player · Multi-player · Co-op · Shared/Split Screen Co-op · Shared/Split Screen · Steam Achievements · Full controller support · DualShock Controller Support |
| Languages | English * * |
| Controller | Full support |
| Achievements | 21 |
| Official site | https://calciumchaos.com/ |
Minimum system requirements (PC)
Minimum: OS *: Windows 7, 8, 10, 11 Processor: i3 or equivalent Memory: 4 GB RAM Graphics: GPU with at least 2 GB of VRAM Storage: 10 GB available space