Selaco is by far my favourite upcoming shooter in Early Access. After the recent big update, they've put out some essential fixes. It appears that last update was causing some problems on Steam Deck.
As the developers said:
Captains,
We’ve just deployed a patch that addresses numerous issues reported by the community, along with several we caught during internal testing, with Steam Deck and stability issues being the primary focus.
The patch from two weeks ago went mostly smoothly, but as always with a major patch, they come with a few unexpected bugs and stability hiccups. We do not take kindly to those!
Not just for the Steam Deck though! There's a performance improvement for particle effects, AI tweaks and numerous bug fixes to different parts of the game.
The latest changes:
Bug fixes
- Fixed Steam Deck stuttering issues.
- Numerous additional performance improvements.
- Particle effects are now loaded on a separate CPU thread.
- Added option to select Render Device in the Video menu. If you experience lower-than-expected FPS, ensure the correct GPU is selected.
- Render Screen option now displays monitor information.
- Enemies are less likely to fire through kickable doors (mostly occurred during the Special Campaign).
- Default FPS is now set to 200 instead of Unlimited.
- Fixed numerous crashes caused by older saved games.
- Removed numerous unintended debug errors from the console.
- Sentry guns no longer fire at walls after their target has died.
- Bullet casings no longer push objects around.
- Fixed an error where destroying a jukebox would spawn a second jukebox.
- Sentry turret pieces are no longer pushable.
- Fixed 'Botomless Mags' typo. Now correctly spelled as 'Bottomless Mags'.
- Fixed crash caused by blood decals referencing non-existent actors.
- 'Wall Shrapnel' effect is now dependent on the Smoke Quality setting.
- Updated numerous outdated Death Tips.
- Fixed error where throwing a VAC-Bot with Gravity Manipulation would not despawn some of their bodyparts.... You monsters!
- Fixed an error where kicking a door with the grenade launcher would endlessly play kicking sounds.
- Fixed an error where the grenade launcher dealt less damage than intended.
Special Campaign
- Level 6-3 no longer crashes when players have Zombies disabled
- Fixed crash caused by Ammo Bearers when the Randomizer is unable to find Ammo in the level
- Combat Chests no longer add to the "Supply Chest" level stat
- Health Injectors dropped by enemy soldiers no longer count as Upgrades
Source: Changelog