Collect 88 Pearls to unlock the Marble mini-game on an Mdisk.
Photograph all animals.
Successfully complete the game and watch the credits. Do not press anything to advance past the credits. Another FMV sequence will start after the credits end.
After you get the camera and photograph the beetle, take a picture of the kids, the dog, and Pey'j to get some pictures for the scientific society, and some money. likewise, go to Mammago's and take a picture of one of the attendants; and in the Pedestrian District, take some pictures of the people there. Some might be an "unidentified species".
You can get quick money by taking risky photos. When you you encounter a big monster in the hilly, it will be a fish-like sea monster. After the intermission sequence, take its picture and send it to the research center. You will get 2,000 credits for it. When you enter the factory, you will encounter another monster. Take its picture and send it to the research center for 2,500 credits. Take all the pictures of fish, animals, rats, and friends and all the people that roam in the street and bars and send them to the research center.
The codes to unlock the Beluga spaceship are on the bottom of the Jet Boots. Select them and rotate them to see the codes.
In the battle with the Domz priest, he will eventually tell you that you are out of control with your soul, and the directional controls will be reversed. A practical way to overcome this is to simply flip the controller upside-down.