Chrome (PD)

HOW TO PLAY:
On the title screen, press F1 for player 1, F2 for player 2, or F3 for both players. Type in the code word for the level you want and press RETURN. Game needs joystick in port 2. Press FIRE to see player/level number, press again to begin.

Not all bad guys can be killed. Time bar decays slowly but faster when touching Anti-Time blocks. Begin with 20 shots (max 3 active at once) and 3 lives. Keep going until the craft can go no more, then the level ends. Bonus awarded according to time taken (skip countdown with FIRE).

LEVEL CODES:
01: START  02: TRUTH  03: JELLY  04: STORY
05: CLOUD  06: MOUSE  07: HUMAN  08: FLOOR
09: PAPER  10: EARTH  11: SPACE  12: GENAM
13: APPLE  14: JUICE  15: CHESS  16: WORLD
17: AUDIO  18: LOGIC  19: TITLE  20: VENUS

Also try the code "CHEAT".

CHEATS:
On the title screen, type "HELO TO GORDON AND DAVEE". Start the game and you will be invincible.

(Source: Ami Cheats)