To get the best performance, you cannot simply drag and drop the ROM. Here is the verified setup guide from the community.
Navigate to Configuration -> Settings:
Yes—with caveats.
If you want a portable Sonic & All-Stars Racing Transformed experience on a Steam Deck, Retroid Pocket 4 Pro, or even a high-end Android phone, Vita3K is currently the best way to play. The PC port remains a buggy mess (Games for Windows Live dependencies, broken online), and the original Vita hardware is underpowered by modern standards. sonic all stars racing transformed vita3k verified
For the “Verified” badge to appear, the Vita3K team needs to solve the random crash bug. Based on the emulator’s GitHub activity, a developer is actively working on a new GPU recompiler targeting exactly this game. To get the best performance, you cannot simply
Vita3K’s network emulation is still in its infancy. While local ad-hoc racing might work with custom configuration, official online PSN races are non-functional. The emulator cannot yet authenticate with Sony’s servers. For a game whose longevity is tied to competitive racing, this is a dealbreaker for verification. If you want a portable Sonic & All-Stars