Worms Blast

All secret characters:
At the start screen (the screen before the main menu), hold [Left Shift] and press [Up] four times, [Down] three times, [Up] five times. A beach ball will fly across the screen from left to right to confirm correct code entry.
Black Ninja and FunkyBlue.

All tournament modes:
At the start screen (the screen before the main menu), hold [Left Shift] and press [Up] six times, [Down] six times, [Up] three times. A beach ball will fly across the screen from right to left to confirm correct code entry.
FunkyBlue.

Bonus characters:
Successfully complete all puzzle mode levels. Go to the volcano level in the middle to unlock Fletcher, Rocky, and Superfrog.

All tournament modes:
Play the game in puzzle mode. As certain levels are completed (for example, Alien Attack), new modes in tournament mode will become unlocked.