GOG has announced its Spring Insomnia Sale which will follow the same pattern as the Winter Sale, meaning dozens of games will be available at massively reduced rates but at limited quantities and sometimes only for a minute or two meaning you'll need to be on your toes to take advantage of the best offers.
The sale began earlier today and will continue until GOG is out of stock. Only one game will be on sale at any given time in limited numbers of copies and when the stock of the current game–marked on the promo page with a counter–runs out, another game will be reduced.
GOG.com's own forums call it "a grueling, nightmarish experience with free games (available for picoseconds) and widespread forum psychosis."
Games included in the sale are Papers Please, Leisure Suit Larry: Love for Sale, and Divinity: Dragon Commander Imperial Edition but 100 titles will be reduced or made freely available in all.