TL:DR; Probabily the most challenging Tetris game ever, because you have to play three at the same time!
In the game of Tetris you control the position of the dropping block so that a complete row is formed, when that happens, the row will be destroyed. This game is challenging because you have to play three tetris games at the same time!
Explore the Fairyland in the final part of the Warkanoid trilogy. Warkanoid 3 features beautiful Story-book themed levels and graphics, smooth control system, tons of funny power-ups and enemies, WorldWide Hall Of Fame.
In Crystalix, you're a wizard who sets out to cleanse his land of the remains of a shattered comet. To clear away bits of the cosmic debris, you must place game pieces of different colors and shapes over matching stacks of gems.
If you are a fan of new variants of the well-known games - try this one. Old wonderful tag-game gained new life. Moving colorful tags and adjusting them by color to clear the board will make you enjoy this game over and over again. Free to play.