Blood Feud
Press A, A, C, A, B. This code must be executed in a two player game. When activated, the words "Blood Feud" appears on the screen, no additional drones are launched after the initial three for the preview, and the boss is never launched. The last player alive wins the match and gets the points for the "Boss Kill" for a normal level. Each round lasts forty-five seconds. If time runs out, both players lose a life. A new round begins each time a player is killed until one of the players has no lives left.
Game Settings
Press LS + C during the demo loop to access the game settings (difficulty and blood), as well as game credits and hardware tests for the joypads.
Rapid Fire
Press B, C, A, C, A, C. The player will receive thirty rounds of Rapid Fire power.
Read Me First
The codes must be entered during the level preview (while the energizer beams in and before the player is beamed into the level). None of the codes will work in the maze bonus round levels.
Super Shield
Press C, A, B, A, B. The player will receive one SuperShield.
Triple Attack
Press B, A, C, C, B, A. The player will receive thirty rounds of Triple Attack power.
Ultra Power-Up
Press A, C, C, A, B, B. This code gives the player a full power-up on all normal abilities except for Turbo, which is doubled. Every time the player picks up any power-up, double Turbo will be regained until the round ends or the player is killed.