Codex Gamicus

Ratchet & Clank centers around the adventures of Ratchet, an Lombax, and Clank, Ratchet's robot buddy, as they attempt to save the universe from the nefarious Ultimate Supreme Executive Chairman Drek. In the game's own words:

In a distant quadrant close to the center of the galaxy, the evil Chairman Drek, leader of the Blarg, is planning to pull off the most crazed real estate land grab in the history of the universe. We're talking whole chunks of planets here! He wants to build a new planet using the best parts of all of the best planets in the galaxy. And, what Chairman Drek wants, Chairman Drek usually gets. All he has to do is convince the inhabitants of those planets to part with a few thousand hectares of their precious worlds. And if they can't be convinced, well, then he'll just take it. Millions of beings will become homeless unless someone intervenes. In order to pull off his big plan, Drek creates a formidable army of war-bots and Blarg warriors. In one of the orbiting bot factories, Plant Z332, a computer glitch produces a diminutive but brainy robot named Clank. Clank realizes what's going on and makes a hasty escape, tailed by security bots.
Meanwhile, on the planet Veldin, a young, self-taught mechanic, named Ratchet, is working hard to get his latest spaceship design to fly. Ratchet has a special talent for building and repairing things and his one dream is to someday leave his home planet and head out on an intergalactic adventure!

The game is followed by Ratchet & Clank: Going Commando.