


After Testing all the levels in Free Skate, this is the list I've made based on the results:
Unplayable Levels (Screen turns black after a short time playing):
- Foundry
- Suburbia
- Los Angeles
- Tokyo
- Alcatraz
- London
- Zoo
Visual Flicking (Very heavy artifacts present, some areas cause black screen temporarily):
- Rio
- Skater Island
- Shipyard
- San Francisco
No Issues (maybe some visual flickering but no black screen):
- Canada
- Airport
- College
- Movie Studio
- Water Park
- Kona

Tony Hawk 4 works and looks flawless, Tony Hawk 3 has graphical glitch on first level preventing progression.
Foundy Level - Screen slowly turns black with square looking textures
Every other aspect of the game works fine. Major graphical bug in Foundry level causes screen to turn black at most angles. Making it unplayable and almost impossible to complete minimum challenges to progress to other levels in Tony Hawk 3.

Out of the box fun
This game works out of the box on Linux/Steam Deck.

Runs perfectly with no tweaks, multiplayer included.
Short freezes in the menus, don't know if it's Linux-specific.
:D

gamemoderun %command%
With default Proton Hotfix, any controller would randomly disconnect and never reconnect, forcing a restart. GE-Proton9-27 fixed this for me.
As of writing, Steam Cloud for 3+4 isn't working.

Resolution: 1280x800
Vsync: On
FPS Cap: 90 FPS
HDR: Off
Scaling: FSR
FSR Level: Performance
Texture Quality: Medium
Shadow Quality: Low
Texture Anisotropy: 2x
Effects Quality: Medium
Ambient Occlusion: Off
Subtitles for dialogue are small, and the size cannot be changed.
You can probably get even better battery life by cranking the settings lower, but the ones I listed should be enough for a consistent 60-90 FPS.

Some subtitles are quite small, but it's not unreadable for me, but might be bothersome to some users.
On the default proton build- it seemed to occasionally crash for unknown reasons. Switching to Proton Experimental seems to resolve it.
The game manages 60fps on Medium settings most of the time, but I do recommend turning on FSR to Quality if you want just a bit more framerate stability.
Oh also, contrary to what it says in many places, the game does have an offline mode and works fine on Steam Deck as long as it's

Game manages to hit a mostly stable 1280x800 at 60fps with the default in-game settings on the Steam Deck OLED, and this can be reinforced by turning on or tuning FSR or resolution scaling, or changing graphics presets.
[This report was based on the Pre-launch Foundary Demo.]

Tested the foundry demo and it's working flawlessly on my ROG Ally with SteamOS 3.7 out of the box. Runs even fine with settings all maxed out