Start With the Specific Steam Deck Demo Symptom
Not every ANOMALITH performance issue has the same cause. An older Steam Deck OLED demo report describes the frame rate staying capped even when the player changes VSync or the in-game frame-rate setting. For that particular symptom, another player recommends disabling frame-rate limits in the Steam Deck's Quick Access Menu.
The Steam Deck FPS-limit discussion on ANOMALITH's Steam forum began on August 7, before the later October demo update. Treat it as an older demo-era community report, not a verified fix for the current full game, Windows PCs, or Switch 2.
The original poster describes these combinations:
| Steam Deck OLED setup reported | Observed result reported |
|---|---|
| 60 Hz display setting, in-game cap set to 60, VSync tried both on and off | Game remains at 40 FPS |
| Display switched to 90 Hz | Game remains at 45 FPS |
These numbers describe that player's experience. They are not a benchmark, a performance target, or a promise of what another device will achieve.
Check the Quick Access Menu's Frame-Rate Limits
The first reply points to the Steam Deck's Quick Access Menu rather than another in-game graphics option. If your symptom matches the report, check whether a frame-rate limit is enabled there and try disabling it as the community reply recommends.
Keep the check focused:
- Note the current frame rate and the limit shown in the game.
- Open the Steam Deck's Quick Access Menu and review its frame-rate limit.
- Try disabling that limit, following the device's current menu labels.
- Compare the result in the same demo scene.
This tests the specific suggestion instead of changing several unrelated settings at once. The collected thread does not contain a follow-up from the original poster confirming a particular final frame rate, so disabling the limit should not be presented as a guaranteed 60 FPS fix.
If your issue is irregular stuttering rather than a steady cap, or you are playing on another platform, the match is weaker. Do not turn a Steam Deck limit check into a claim that every ANOMALITH slowdown has been explained.
What the GE-Proton Reply Actually Says
A second reply says that changing to GE-Proton fixed performance for that player. It does not identify the GE-Proton version, list a configuration, provide before-and-after frame times, or confirm the result on the original poster's setup.
That makes it a separate community lead for Steam Deck users who already understand their compatibility-tool choices. It is not enough evidence for a universal installation procedure or a specific recommended version, and it is not a Windows or console repair.
If you compare compatibility tools yourself, keep a note of the tool and version used and whether the same scene changes. Preserve the distinction between your observed result and the one-sentence player report; neither should be advertised as a tested outcome for every configuration.
Separate Platform Impressions From Confirmed Solutions
More recent ANOMALITH demo discussion on Reddit includes community reports of acceptable average performance alongside stutters and a desire for further optimization. Replies also come from people using different platforms, so the community name alone does not identify every commenter's hardware.
Those impressions establish that some players noticed performance concerns. They do not establish a shared cause or a confirmed Switch 2 fix.
For official PC requirements and the game's current Steam listing, check the ANOMALITH Steam page. Requirements describe the listed hardware baseline; they do not guarantee that a particular tweak removes a frame-rate cap or stutter.
When reporting a remaining problem, include the platform, demo or full-game status, build if known, whether the issue is a steady cap or fluctuating performance, and the settings you actually tested. That is more useful than applying an older handheld report to every device.
FAQ
What should I check if the Steam Deck demo ignores the in-game FPS cap?
An older community reply recommends disabling frame-rate limits in the Steam Deck's Quick Access Menu. It addresses a player report of a steady cap despite changing in-game options.
Does that guarantee 60 FPS?
No. The collected thread does not confirm the original poster's final result or provide a repeatable benchmark. It supplies a targeted check for a matching symptom.
Did GE-Proton help anyone?
One player says switching to GE-Proton fixed performance for them. The report does not specify a version or enough detail to establish a universal configuration.
Are these fixes for Windows or Switch 2 stuttering?
No. The actionable reports are from an older Steam Deck demo discussion. Other platform impressions do not provide a confirmed cause or a corresponding repair procedure.