Triple Triad was amazingly simple, numbers 1 - 9 and A, A beats all numbers of higher value beat others turn on 4 axis, walls = A always.... and simplicity worked for it. With Tetra master it got too complex, turn on up to 8 axis, attack and defence ratings even I couldn't figure out (I spent probably in excess of 100 hours on Triple Triad removing all the rules in the game bar Open, All, Same wall. A lengthy process but awesome to use, same wall cannot work without same so it's effectively removed from play meaning "open" and "all" are the only 2 rules in play anywhere) I liked Tetra master to a degree and managed eventually to find cards I could win multiple games with but there was no bonus to doing it other than the black-jack game at the end with Vivi.