Ultimate Tic Tac Toe
Yep, It's tic tac toe in minecraft. Oops correction: 'Ultimate' tic tac toe.
It's pretty much the same, except it's 9 times as big and has a s**tload of extra rules and stuff.
You can play the online version here on bejofo.net/ttt
PS Yes I know you can bundle your resource pack with the map, but it's a multiplayer map so you'll play it on a server anyway.
Music at the end is Cipher by Kevin MacLeod)
Full credits because I'm a nice guy:
"Cipher" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0