My favorite PS2 game was Halo 3. Out of the few dozen PS2 games I have, nothing compares to Halo 3, not even the most recent Halo. Halo 3 on the PS2 just had the perfect balance of competitivity and fun. The vehicles, especially the ghost, made that game extremely joyful to play. Now, the Halo games are way too competitive, and players forget to have fun with it. That was not the case for Halo 3, which is why it is my favorite.