Successfully complete the game under the hard difficulty setting with a "S" rank to unlock Level 3 Psychic mode.
Short modeSuccessfully complete the game under the easy or normal difficulty setting. Load the cleared saved game to toggle short mode.
Hard modeSuccessfully complete the game under the normal difficulty setting with a "B" or higher rank.
Alternate ending sequenceSuccessfully complete the game under the normal or hard difficulty setting.
Hints, Tips & TricksExtra skipIn the Enriched Uranium Refinery, in the room where you format the security card to "Saturnus", defeat all the red and gray robots after you talk to Ash over the security screen.
Defeating SpiderAfter defeating Dorothy in your first fight, you will go to the start of the level and make your way past the rooms. You will fight a boss named Spider. Try to move away from the dangling spiders. His weakness is Fire (red serum). When a spider gets on you press R1 (shield) to get them off. You cannot attack him with D-Felon (blue serum). When he comes down from his web, use Fire or Nalcon on him. After you defeat him, you obtain a Skip (allows you to improve a serum ability). Use your Skip on the Nalcon, as it will be needed later. Then, open the gate and cross the bridge to Dorothy.
Defeating NitroWhen you go into battle with Nitro, you will find her very annoying. Use the following trick to damage her. When you first start, go near her and use the blue serum on her. It will make the things floating near her to go up. When the attack is charged, release and each floating thing will do over 700 damage to her. The serum can also be used as a shield from her attacks.
DorothyWhen you start your first fight with Dorothy, attack with the Nalcon (green serum). Continue attacking her, and try not to stand on the lighted spaces and dodge the eyeballs.
