It's an emulator! That plays old LucasArts adventure games, along with a handful of other similar titles. You'll still need the actual disks/CD, of course. Unless you want to play Beneath a Steel Sky, because Revolution Software provided the source code. Oh, and Beneath a Steel Sky is available as a free download from the site. The emulator also supports Simon the Sorceror 1 & 2, Broken Sword, and Flight of the Amazon Queen, which is also freely available thanks to John Passfield and Steven Stamatiadis.
US Downloadable Games (apparently they're reissuing mediocre games from 2007 to fill out the library?) - Brothers in Arms D-Day ($15) - Chessmaster: The Art of Learning ($20) - Driver 76 ($20) - Teenage Mutant Ninja Turtles ($20)