A fantastic source of free (Libre) games.

"On My abandonware you can download all the old video games from 1965 to 2012 for free! You can play Pacman, Arkanoid, Tetris, Galaxian, Alter Ego, or Blackthorne, Civilization, Sim City, Prince of Persia, Xenon 2, King's quest, Ultima, Kyrandia, The Incredible Machine, Another World, Test Drive, Flashback, Lemmings!"

"A home for building and playing your curated game collection, GOG is a digital distribution platform that puts gamers first and respects their need to own games." GOG is a platform for purchasing DRM-free games.

"With nearly 30,000 games from AAA to indie and everything in-between. Enjoy exclusive deals, automatic game updates, and other great perks."