I don't want to say too much, but To the Moon follows a group of doctors as they help an elderly man fulfill his one lifelong wish. The beautiful, retro-looking RPG has an absolutely wonderful story and is a unique, genuinely moving videogame experience. (Also, the soundtrack is incredible.)
The sale only lasts for one day, so grab the game if you can! You will be so happy you did."
I really wish this was on Mac.