Here are some cheat codes and passwords for Abadox for the NES.

Abadox was released in March of 1990 for the NES. You are Second Lieutenant Nazal in the game Abadox. Your mission is to battle Parasitis, who is an alien organism that has consume the planet Abadox, and assumed its shape. Everything that was Adadox is now inside Parasitis. You must now fly into Parasitis lifeform to save Abadox and save Princess Maria before it is too late.

Abadox NES Cheat Codes
To use any of these Abadox NES cheats, you must be on the copyright screen. When you are there, press the following:

Invulnerability and Power-Ups
A, A, UP, B, B, DOWN, A, B, START (To instantly gain power-ups, pause and then resume the game.)

Warp to Stage 7 with Invincibility
A, A, UP, B, B, DOWN, A, B, B, START

Stage Select
LEFT, UP, RIGHT, DOWN, UP, RIGHT, LEFT, DOWN, and then hold the following when pressing START (and also hold A to warp to the middle of the desired stage):
- Stage 2 – UP
- Stage 3 – LEFT
- Stage 4 – DOWN
- Stage 5 – RIGHT
- Stage 6 – SELECT
- Stage 7 – B