Nintendo 64 Codes
Unlock all arenas/characters (inc. Y the Alien).
Show all the end sequences in one sitting.
Unlocks 'Y the Alien'.
Unlocks all vehicles in the game, bar 'Y'.
Unlocks all the hidden levels.
With reduced gravity, cars spend longer in the air.
Slow motion mode.
You can choose more than one of the same vehicle in multiplayer mode.
Lets you drive about the levels with no enemies at all.
Switches off the delay when fireing weapons, so you can let rip with them as fast as you want.
Interceptor missiles cause more damage and track targets better.
Enables Ultra high difficulty level.
Switches on the high res version of the game (n.b. may cause slowdown.)