Is Mortal Shell playable on Steam Deck?

Tested on Steam DeckLast checked June 2026

Steam Deck verdict

Runs great

Yes — Mortal Shell runs great on the Steam Deck.

Mortal Shell runs great on the Steam Deck. Valve has officially marked it Steam Deck Verified. The Linux/Proton community rates it Platinum on ProtonDB across 27 reports. As a action game with full controller support, it's a comfortable fit for handheld play.

Game info

Genres: Action, RPG
Developer: Cold Symmetry
Publisher: Playstack
Release: August 18, 2021
Price: $29.99
Metacritic: —

System requirements

Windows specs from Steam — the Deck runs these through Proton.

Minimum:

Requires a 64-bit processor and operating system
OS *: Windows 7 SP1 or newer
Processor: Intel Core i5-4590 or AMD FX 8350
Memory: 8 GB RAM
Graphics: NVIDIA GTX 970 or AMD Radeon R9 290
Storage: 12 GB available space

Recommended:

Requires a 64-bit processor and operating system
OS: Windows 10
Processor: Intel Core i7 or AMD Ryzen 7
Memory: 16 GB RAM
Graphics: NVIDIA GTX 1070 or AMD Radeon RX Vega 56
Storage: 12 GB available space

Steam Deck compatibility

Does it run?

Valve rating: Verified
…on SteamOS in general: Playable

Does it run well?

Runs well with the default settings.

✓Full controller support out of the box
✓Controller glyphs match the Deck
✓Interface text is legible
✓Good performance with default settings
✓External controllers not supported primary player

Mortal Shell performance & FPS on Steam Deck

~40 fpsreported by players

Based on 1 Steam Deck community reports. These are the framerates players actually settle on — many cap it to save battery — not the game's maximum. Runs well with the default settings.

Battery & recommended settings

Estimated battery life

3h 20mat 40 fps

Recommended preset: low
Typical power draw: ~15 W

💡 SteamDeckPlayable tip: System Proton version 8.0-4 Steamos version 3.5

Tips for playing Mortal Shell on Steam Deck

•Default settings already run well — no major tweaks needed to play comfortably.

Frequently asked questions

›Is Mortal Shell playable on Steam Deck?

Mortal Shell runs great on the Steam Deck. Valve has officially marked it Steam Deck Verified. The Linux/Proton community rates it Platinum on ProtonDB across 27 reports.

›Is Mortal Shell Steam Deck Verified?

Yes. Mortal Shell is officially Steam Deck Verified by Valve.

›How many FPS does Mortal Shell get on Steam Deck?

Steam Deck players most often report playing Mortal Shell at ~40 fps (based on 1 community reports). These are usually the framerate players settle on — many cap it to save battery — not the game's maximum.

›How long does the battery last playing Mortal Shell on Steam Deck?

Steam Deck players report roughly 3h 20m at 40 fps on Mortal Shell (from ShareDeck community reports). Capping the framerate and TDP lower stretches it further; higher brightness shortens it.