At the weapon options screen, press [X + Square] eight times. Then, banana bombs, sheep bombs and a minigun will become available. Additionally, the Ninja Rope will be extra bouncy.
At the weapon options screen, press Down, Right, X, Square(2), X, Square(2), X, Square(2).
Set the move timer and round time to unlimited. Then at the weapon options screen, press [X + Square] eight times. Now while playing a game, pause and select extra time. All worms will be reduced to one hit point. This is particularly useful it is your turn with one team left, and an airstrike is available.
Start a fire punch, quickly hold Square press R1, L1, Circle. Then, a boxing match featuring one worm from each team will begin. Now defeat your opponent using just punches and dragonballs. The normal game will resume after one worm is defeated.
Enter one of the following passwords to play the corresponding bonus level:
| Level | Password |
| Hell | Hades/666 |
| Woods | Forest |
| Candyland | Candy |
| Junkyard | Junk |
| Martian | Mars |
| H. R. Giger-type Alien | Alien |
| Polar | Artic |
| Infinite Energy P1 Worm 1 | 8014A54C 0064 |
| Infinite Energy P2 Worm 1 | 8014A7FC 0064 |
| Infinite Energy P1 Worm 2 | 8014A5F8 0064 |
| Infinite Energy P2 Worm 2 | 8014A8A8 0064 |
| Infinite Energy P1 Worm 3 | 8014A6A4 0064 |
| Infinite Energy P2 Worm 3 | 8014A954 0064 |
| Infinite Energy P1 Worm 4 | 8014A750 0064 |
| Infinite Energy P2 Worm 4 | 8014AA00 0064 |
| Exploding Rusty | 8014A7B2 0002 |
| Infinite Turn Timer | 8014B7FC 0E11 |
| Infinite Teleport P1 (All Worms) | 8014B1CC 0002 |
| Infinite Teleport P2 (All Worms) | 8014B220 0002 |
| Infinite Airstrikes P1 (All Worms) | 8014B1C8 0002 |
| Infinite Airstrikes P2 (All Worms) | 8014B21C 0002 |
| Infinite Sheep Bombs P1 (All Worms) | 8014B1EC 0001 |
| Infinite Sheep Bombs P2 (All Worms) | 8014B240 0001 |
| Infinite Dynamite P1 (All Worms) | 8014B1C0 0001 |
| Infinite Dynamite P2 (All Worms) | 8014B214 0001 |
| Infinite Homing Missiles P1 (All Worms) | 8014B1A4 0002 |
| Infinite Homing Missiles P2 (All Worms) | 8014B1F8 0002 |
| Infinite Cluster Bombs P1 (All Worms) | 8014B1AC 0005 |
| Infinite Cluster Bombs P2 (All Worms) | 8014B200 0005 |
| Infinite Mines P1 (All Worms) | 8014B1C4 0002 |
| Infinite Mines P2 (All Worms) | 8014B218 0002 |
| Infinite Girders P1 (All Worms) | 8014B1E0 0003 |
| Infinite Girders P2 (All Worms) | 8014B234 0003 |
| Always Your Turn [Note 1] | D0079EB4 0002 8014B1EC 0001 |
| Switch Turns [Note 2] | D0079EB4 0008 8014B1EC 0000 |
| Random Movie Player [Note 3] | D0079EB4 0100 8007A074 0001 |
Note 1: As long as you hold R2 it will always be your turn.
Note 2: Press R1 to switch between turns.
Note 3: At the title screen, press Select to play random FMV sequences in the game.
