Animales de la Muerte looks great. Humor in games grabs my attention more than anything, and I'm definitely interested in this title.
Gyrostarr looks so pretty and crisp, and from the looks of it the 4 player co-op is a great addition. +2 for High Voltage
I'm also hearing good things about World of Goo. It's definitely a creative puzzler.
I always loved Defend your Castle on the PC, so for $5, I might just pick it up. 4 player co-op is a nice feature, and the graphical style is awesome.








