Just over a week ago, the Nintendo 64 game console celebrated its fifteenth birthday. On September 29, 1996, the third generation of Nintendo systems debuted in North America. The Nintendo 64 (often abrbeviated N64) was certainly an innovative system, with many great games and unique features. However, it never really lived up to its smashingly successful predecessors due to the dominance of the original Playstation in the market. Co-op games weren't popular at the time the N64 was released, but there are still a handful of excellent cooperative experiences available, if you knew where to look.