In these Games, you play as Ratchet, a type of racoon think that was mutated, on a regular planet. Then one day the Evil Drek trys to take parts of worlds to make his own world since his other home planet got poluted. Then a robot named clank flys down from the sky right by you, he doesn't work a first so you fix him and then you sett out trying to find Drek. That's what u do for alot of this game. The fun part is the Arsenal you get in the game, Because its so cool. There are tons of weapons to chose from. My fav. is the Suck Cannon. With this weapon you suck up small enemies till the cannon is full then you shoot them out a rocket speed at your enemys. Thats how the game goes, you go through dofferent worlds trying to save there Galaxy, killing stuff. It sounds boring, but its so fun doing the levels that there is to offer. On some of the levels, instead of playing as both Ratchet and Clank(who sits on your back, helping you fly and boost up). Some times you play as just Clank, who cant use weapons, but commands little robots to fight for you. After all the levels you finaly fight Drek and of corse win. In the Second Game you play pretty much the same but there is a much bigger arsenal to choose from, and Clank can control more robots this time. In the last game Gagetron supplied you at the vendor, well there out of buisness but now Megacorp supplies you with weapons. The Professor Mr. Fizwigit got you up for the job of saving there "Proto Pet" as they call it later in the game. Well you have to save it from a mysterious person who stole it from Mr Fizwigit's Lab, but when you get it back, the person who stole it is just like you(she's your species) and you find out that the "Proto Pet" is a vitious thing that will eat people alive. Then Capitain Quark(who is a villan in the first game who you really think is a hero). Tries to get it under control,but fails and makes it huge(like 20 stories huge). Thats one of the big bosses in the game, another big boss on this game is the "Thugs-4-Less" leader (they help out Captain Quark). He's in this Huge Robot. After you beat the game you get to play through it again with all the wepons you ended with befor u beat it and you will have the ability to buy"MEGA WEAPONS" which make your weapons very strong(its like a third upgrade). Now in the Third Game "Up your Arsenal" there will be better worlds better texture on your surroundings and here's the best part" MULTI-PLAYER"(on-line and off). I dont Know much about the story on this part of the game, but I do know that there is "MULTI-PLAYER" in this game.