Addicted to brainy challenges? Then fire up your competitive side with Otrio, the 2-4 player head-to-head strategy game! To claim victory and win, get three pieces of your color in a row based upon similar size; lined up in ascending or descending order; or within the same space as three concentric pieces. The rules are simple enough for kids to learn and play but the game is complex, and intellectually satisfying even for adults! Depending on the wit of your opponent, you may need to sharpen your strategic skills and exercise critical thinking! Straight out of the Brain Workshop, Otrio turns a child's game of tic-tac-toe into a full fledge strategy battle. A unique game that is engaging, challenging and beautifully built! Show off your smarts in a brainy showdown with Otrio!