What can a Steam Deck emulate?

A Steam Deck sits near the top of the emulation ceiling: PS1, N64, PSP, DS, Saturn, Dreamcast, GameCube, Wii and most PS2 run full-speed or close to it, 3DS and Wii U are broadly playable with tuning, and Switch-class emulation is experimental and title-dependent where it works at all. These are consensus bands from published testing — individual titles vary, and demanding games sit a band below the easy ones. As always, this only covers games you legally own; we do not point you at game or BIOS files.