Coloring Gems is a simple game for 1 or 2 players. The. game field is build up out of small colored gems. The object of the game is to gather as many gems as. Gem Tower Defense is one of the best tower defense strategy games you can play today. For those who want to experience something a bit different, try out. Connect 3 or more of the same type of gems together in a row to collect the jewels and score points. Gem Collect GunBlood Western Shootout Flash Game.