One game that I very much enjoyed was Torchlight, which came out some years ago by Runic Games. It was created by the original Diablo team that left Blizzard to start their own company. They created a sequel, aptly named Torchlight 2, at which time I am patiently waiting for a Mac version to be ported over.
I was checking out some different articles on the web about the game and came across a video of a player who finds a hidden Minecraft Ester Egg while playing Tourchlight 2. What I love about the video is the players reaction and overall delight and appreciation as to the developers efforts to insert a fun, little surprise.
Enjoy!