Yes, we're a bit late to the party, but it's time to correct that oversight. GOG.com are celebrating their fifth birthday with a charity sale that lets you snag three excellent games for $5, and donate to charity as you do so.
Step 2: Pick some great games. The likes of FTL, Botanicula, Driftmoon, Oddworld: Abe's Odyssee, Waking Mars, Incredipede are more than on offer. Be aware that The Whispered World is available in another bundle, though.
Step 3: Actually that's pretty much it.