One of the games that kept the group going, other than Minecraft in the beginning (which is pretty much a running joke now), was Halo: Custom Edition. The modding community has transformed the game to emulate Halo 2, 3, 4, and Reach- even going as far as to make the game their own. As we hope for The Master Chief Collection to come on PC, this is the best we have.

If you're interested, join the Skype convo to play with hundreds of CE players with us, here's the link: skype:?chat&blob=VGP34GEA9cRjzueiJbt6TenW9fdVHxSNNFuWsnroxZEdr853hPgiFRnpGkIq0iJp1t5MtPqYKdSy. You'll have to paste it within skype and then click it to join. The download link for the game is in the topic.