ROG Xbox Ally vs Steam Deck: How to Audit Game Compatibility Before You Buy

Shattered’s “Xbox Ally vs Steam Deck Games” guide proposes a 12-step Python workflow that combines Steam ownership and playtime, Deck ratings, ProtonDB information, community anti-cheat records, Windows platform data and an optional Xbox CSV. It is a useful triage idea—not a substitute for checking the games that actually matter to you.

The sensible outcome is a prioritized testing list, not a spreadsheet declaring victory for either handheld.

What the compatibility signals really mean​

Valve’s Deck Verified program checks more than whether an executable starts. Its published criteria cover controller input, readable text, display support, launcher navigation and system compatibility, including middleware such as anti-cheat. A green badge therefore carries more information than a Windows platform listing.

There is also an important correction to the notion that compatibility ratings say nothing about performance. Valve’s current developer checklist includes a playable default configuration, specifying 30fps at 800p on Steam Deck. That is a baseline within the review—not a promise of your preferred graphics settings, sustained frame times in every scene or a particular battery runtime.

For this audit, keep three questions separate:

• Availability: Is the appropriate game version available to install?
• Compatibility: Does it work with the device’s software, controls and required services?
• Experience: Does it meet your expectations for performance, readability and convenience?

These should be separate columns. A single “Runs” label compresses too much uncertainty into four reassuring letters.

A practical 12-step library audit​

The following is a suggested checking workflow rather than a claim that the original Python project has been live-tested. You can complete the initial inventory in one sitting; downloading games and validating them on hardware should be a separate exercise.

1. Define the devices and software being compared​

Write down each exact device name and its installed operating-system version. Include the graphics driver and any relevant handheld management software.

Do not apply one device’s measured results to another merely because both run Windows. Treat shared operating-system support as a starting point, not a performance equivalence.

2. Start with games you intend to play​

Choose a manageable shortlist—perhaps your ten most important games—before processing an entire backlog.

Use playtime as one prioritization aid, but add upcoming purchases and games you recently started. A heavily played title you have finished need not outweigh the multiplayer game your friends are playing next weekend.

3. Create a report with explicit evidence fields​

A spreadsheet is sufficient. Suggested columns are:

Game,Store,Edition,Priority,Deck_rating,Deck_notes,
Windows_availability,Anti_cheat_evidence,Evidence_date,
Device_test,Settings,Result,Next_action

Record the edition and storefront, not just the display name. This gives you somewhere to preserve uncertainty instead of forcing every row into a yes-or-no answer.

4. Check Valve’s existing library view first​

Valve already provides compatibility ratings in the Steam Deck library, compatibility filtering and a personalized library breakdown. Use those facilities before creating credentials or building an automation project.

Automation is most useful when you need repeatable exports or comparisons—not simply to discover that your five favorite games already have clear compatibility notes.

5. Read the explanation behind the badge​

For Playable and Unsupported games, inspect the Steam store’s compatibility details. Valve says these identify which Verified requirements are not met. A launcher requiring touch input and a system incompatibility demand very different responses.

Copy the specific issue into your notes rather than recording only the badge color.

6. Keep community findings separate​

Treat community evidence as an additional field, not an invisible replacement for Valve’s assessment.

AreWeAntiCheatYet describes itself as a crowd-sourced record of anti-cheat compatibility with GNU/Linux or Wine. Its repository maintains the underlying list in games.json and tracks updates through the project. That makes it useful corroboration, but not a publisher guarantee for your installed game build.

Record the evidence date and distinguish a missing entry from an affirmative compatibility finding.

7. Make the Windows column conservative​

Use a label such as Windows version listed, followed by a separate tested on this device field.

That distinction is an editorial recommendation: availability evidence should not be promoted into a hardware test result. Leave controller behavior, launcher access and actual gameplay unresolved until you check them.

8. Inventory Xbox and other storefronts independently​

Maintain separate rows for games outside Steam. Include the store, edition and whether your access depends on a subscription.

In the published Python implementation, the Xbox CSV only marks matching Steam-library rows; it does not add Xbox-only games to the report. Consequently, it cannot represent a complete cross-store library audit.

9. Use buckets that preserve uncertainty​

For purchasing decisions, these categories are clearer than an unconditional “Ally only” or “Deck only”:

Keep any confirmed incompatibility in its own field, with the reason and date.

10. Test the shortlist consistently​

My recommendation is to use the same save point and a fixed test window wherever possible. Record:

• Whether the game reaches actual gameplay
• Controller operation and readable interface text
• Sign-in or keyboard requirements
• Resolution, graphics preset and frame cap
• Power profile and docked or handheld operation
• Any reproducible crash or connection failure

A main menu is an encouraging beginning, not the finish line.

11. Troubleshoot one change at a time​

Valve recommends installing available system updates and restarting before deeper Steam Deck troubleshooting. For a specific game, its documented compatibility path is Properties > Compatibility > Force the use of a specific Steam Play compatibility tool; Valve suggests trying the latest Proton version.

Record the chosen version and retest. Avoid changing several settings simultaneously, or you will not know which change helped.

12. Save a dated decision report​

Preserve both the evidence and your observations. Before spending money, refresh unresolved entries and retest the games whose absence would change your decision.

Your final summary should answer: “Which important games remain unavailable or inconvenient?” That is more useful than a raw percentage of the backlog.

Fix the automation before trusting its output​

Several details in Shattered’s published code warrant correction:

• The displayed .gitignore command concatenates intended exclusions rather than clearly excluding .env.
• --skip-windows assigns True, turning an omitted check into a positive result.
• The Markdown writer joins report lines without newline separators.
• Compatibility caches have no expiry.
• The ownership request still runs on later live executions; cached compatibility responses do not eliminate that request.

These are consequential reporting issues. A skipped lookup should remain not checked. A report generated today should not disguise an older cached answer as fresh evidence.

Protect credentials, preserve missing-data states and validate live response structures before relying on an automated purchasing recommendation. Demo rows and mocked responses can exercise program logic; they cannot demonstrate real-device compatibility.

The decision that matters​

Valve describes compatibility review as an ongoing process, with game updates and improvements to the Deck changing what works. A library audit is therefore a dated assessment, not a lifetime certificate.

Use automation to narrow the investigation. Use official compatibility details to understand the likely obstacles. Then test the handful of games that would make—or break—your purchase.

The best handheld is not necessarily the one with the longest theoretical compatibility list. It is the one that plays your important games with the fewest compromises.