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Achievements are now implemented.
Achievements are now implemented, and if you have already fulfilled requirements for any, you should receive the achievements instantly!
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Arm of Satan: Chapter 1
Also known as Arm of Satan: Chapter 1, aosc1, arm of satan chapter 1
ARM OF SATAN is a tough 2D platformer that can be played solo, or with a unique 2-player local co-op mode. Featuring kick ass visuals influenced by the Hellboy comics, arcade-inspired gameplay, and a deep and captivating narrative.
Last update
17 Jun 2026
Players now
0
Latest update
Update history
Browse past updates and patch notes for this game.
7 updates
March 2026
- Update notes for v1.1.0Some general fixes, including an iteration of Level 6 for smoother gameplay.
November 2025
- We're into our last day of our 20% launch discount! What better excuse to grab a copy and descend to hell? Heck! Maybe even drag a friend with you!Patch notes
October 2025
- Arm of Satan has launched!Arm of Satan is finally here! Grab our debut studio release at a special Halloween 20% discount! The game has been designed as a great local co-op game for two players, or a difficult solo twin stick platformer. Fancy a…
January 2025
- Development news from the depths!Hello, Girls and Arms, 📢 We have some Arm of Satan news! But first, exposition! As some of you know, Ludophoria is a small collective of devs and friends. We all work part-time in various areas (lecturing, making pizza…
February 2024
- ARM OF SATAN developer live streamOur devs will be playing local co-op Arm of Satan, with lots's of screaming, shouting, falling out with each other and ultimately having a great time. Come join us for a cozy stream of the game, with the chance to ask o…
- ARM OF SATAN developer live streamOur devs will be playing local co-op Arm of Satan, with lots's of screaming, shouting, falling out with each other and ultimately having a great time. Come join us for a cozy stream of the game, with the chance to ask o…
Gallery
In-game media
Achievements
Community progression
Top picks from 23 Steam achievements, sorted by player unlock rates.
- Dip Dip!Take a lava bath12.8%
- Best FriendsComplete a level with Teddy10.0%
- True HeroPick up teddy after dropping him10.0%
- Eternal DamnationHidden8.5%
- Safe and SoundRescue all Lost Souls4.2%
- I Choose You!Hidden4.2%