Doom
  
Gameboy Advance


  


God Mode:


  During gameplay pause the game, then hold R and L and press A, A, B, A, A, A, 
  A, A.



All weapons, keys, Items:


  During gameplay pause the game, then hold R and L and press A, B, B, A, A, A, 
  A, A.
Level Skip:


  If you are totally stuck on a level, then use this cheat to skip it all together. 
  Pause the game, hold L + R and press A, B, A, A, B, B, B, and then A. The word 
  loading will appear if you got it right.



Invincibility:


  During gameplay pause the game, then hold R and L and press B, B, B, A, A, A, 
  A, A.



Computer Map:


  During gameplay pause the game, then hold R and L and press B, A, A, A, A, A, 
  A, A.



Berserk Mode:


  During gameplay pause the game, then hold R and L and press B, A, B, A, A, A, 
  A, A.



Radiation Suit:


  During gameplay pause the game, then hold R and L and press B, B, A, A, A, A, 
  A, A. 



  Thanks to Revolution readers Symbiode and Ben Alqadhi!