The GOG.com Charity Promo is a charity campaign where you pick at least 3 games, and pay at least $5, and the entire price you choose to pay for the game will go to charity. GOG.com will even donate the fees it costs to process your orders (estimated at $0.25 for every $1), so 100% of your order will go to the charity you pick. You can choose between WWF, World Builders, and Gaming for Good.
There are 13 games to choose from, including the adventure games The Whispered World, Gemini Rue, and Botanicula. The non-adventure games in the package include FTL: Faster Than Light, pid, Anodyne, Escape Goat, Creatures Village, Waking Mars, Incredipede, Driftmoon, Darwinia, and Oddworld: Abe's Odyssee.