Title says it all. It's mostly indie and classic titles, all mixed into one big potpourri of game genres.
These are the first 40 out of a total of 84 games. 66 of them are purchased from GOG.com (No DRM FTW), 8 are from Steam (eversion, Poker Night 2, Scribblenauts Unlimited, Spore, Spore: Galactic Adventures, Team Fortress 2, Worms Reloaded, Worms: Ultimate Mayhem), 3 are from the Humble Store (The Binding of Isaac + Wrath of the Lamb, The Blackwell Epiphany, Haunt the House: Terrortown), 1 is a paid beta (Cube World), 1 is freeware (Dreaming Mary), one is from *shudder* Origin (The Sims 2: Ultimate Collection), and 1 is... well, Minecraft. I've also included 3 web browser games (Pretend You're Xyzzy (aka CAH online), Profitania, Town of Salem), but whether they count is up to your judgement.