In case that ever goes south you can download almost any SteamDRM game, replace SteamAPI.dll or SteamAPI64.dll with Goldberg's Steam emulator's version, toss a text file called steam_appid.txt with the games app id (the number on the games storepage), and play the games just fine.

All it requires is having the vanilla game files. Games that use further DRM solutions on top of SteamDRM may require other steps (if the game uses SteamStub Steamless is the solution) but most steam games don't.