Prime 1: The bad guy aliens find a radioactive space goo that crashed into a planet and contained by bird people a long time ago, and make big monsters with it. The biggest monster is called [Title Drop].

Prime 2: A spooky asteroid crashes into a planet and creates an evil Halloween version of it. The moth people tried to fight Halloween but they failed, so they all went to sleep to wait for someone to come along and fight Halloween for them.

Prime 3: Actually, the radioactive space goo is sentient or something and it's been behind everything the whole time. It all comes from a big evil blue space goo planet that keeps throwing radioactive space goo asteroids at people. Also, the radioactive space goo makes you evil if you let the energy bar fill up all the way while you're using your space goo laser.

Science team has vapor for brains.