There is this little seaside village where everyone is miserable and unhappy and so there’s this company near the village who want to cheer the village up and make everyone happy and so they take a gigantic boat (humongous) and they send it out to this place where nobody has ever been before. They think they’ll make lots of money and make everybody happy and stuff. Once the ship has arrived, they realize nobody has been there before because the place is completely covered in radiation. The water is full of mutants and stuff. The ship breaks down because the mutants are destroying the ship. You have to kill the mutants on the ship so you can rebuild it and go home.
The next takes place underwater.
You use parts of the ship to create an underwater mech suit which has tons of weapons like chainsaws and torpedoes.
Different kinds of mutants: One that looks like a giant grey grasshopper. It swallows a piece of the ship and you have to kill it without it noticing you. It is completely blind but has great hearing but you have to sneak past it and shoot explosive barrels to kill it. And if it sees you once, you die.
Home is the last level.
You accidentally brought some of the mutants back to the village which spread the disease. Everybody is a fish person. You accidentally brought a mutant back to the town on the ship and you have to seek it out and kill it. It’s a little tiny really quick thing that goes everywhere on the ship. You have to find it and shoot it.
By killing it, everything goes back to normal and you win the game.