Crash Bandicoot 2: Cortex Strikes Back is the second additon to ther Crash Bandicoot series. It includes new baddies, a new storyline, and the addicting-and-yet-challenging level designs, and the ability to use Sony's Dual Analog controller (Analog sticks). This game also features smoother, less grainy graphics and sound improvements. Although Crash's girlfriend from the first game seems to have disappeared completely, the game still ties into the storyline following the events of the previous game. My complaints? Absolutley nothing.
Rebattle bosses: Press and hold all the shoulder buttons (L1, R1, L2, R2) at the same time while standing on the circular platform in the middle of the warp room. You then be able to re-battle the boss from whatever room your standing in.
The Wrath of Cortex: At the beggining of the game, after Cortex tells Crash to collect him power crystals, go into Turtle Woods, then come out. Cortex will get very angry and give you another speech. Do it once more, and he will be very, very, VEEEEEEEEEEERY angry. You get the picture.
Extra lives: When you make it to the second warp room, you'll notice a helpless polar bear sitting next to a level portal. Jump on the bear a few times and you will be awarded with a lot of lives. You can only do this once, so choose the time to do it wisely.