Place the game in a PC CD-ROM drive to find .bmp images from the game in the 'omake' directory. To voice samples in .wav format are also in this directory.
Beat the game 4 times and start each from the previous file, and on the 4th file rescue and talk to the shuttle worker, give the guy in the Hello Market his Docksin, give the Gaily/Gary doll to the girl in the arcade, and talk to Aisha before you meet Dr.
Heat Seeking Ray Gun
Complete the game twice to get the Heat Seeking Ray Gun.
Swimsuit Mode
Finish the game twice and save it. Begin a new game from the saved game file. Now finish and save the game without: - Saving the elevator Worker or Devlin - Winning the girl, Big Gailey, in the arcade - Talking to the D
All weapons
To get all weapons, beat the game in 5 hours.
Big Eyes mode
To get Big Eye mode, beat the game in hard mode.
Unlimited Ammo
To get Unlimited Ammo, beat the game within 5 hours. You will have unlimited ammo for all weapons.