Each player has 25 equilateral triangles in his color. After the first tile, players alternate playing a tile adjacent to some existing tile.
The winner is the first player to form a larger, 4-tile triangle with his color on the tips, and either color in the center.
Online Play
boardspace.net Real time or turn based, AI option gamerz.net (play by email)
Mobile Apps
Boardspace.net local multiplayer or online, IOS Boardspace.net local multiplayer or online, Android