Kerwan

Kerwan is a bustling planet that is home to the gigantic city of Metropolis. In Deadlocked, Sasha becomes the mayor of Metropolis.

In Ratchet & Clank, Ratchet and Clank - having acquired an Infobot on planet Novalis that featured Captain Qwark at Big Al's Roboshack - try to find the hero in green, but ultimately only leave the planet with a newly-fitted Helipack, a Swingshot, and an Infobot to planet Eudora.

In Up Your Arsenal, Ratchet and Clank face Dr. Nefarious's Bio-Bliterator menace and must defeat Klunk.

In Tools of Destruction, the duo must fight off Emperor Percival Tachyon's deadly space armada. According to IRIS Tachyon and his army left Kerwan after combing Metropolis for the Lombax Secret and the city is now under reconstruction. Although this is the same Metropolis from Ratchet 1 and 3 it looks completely different in Tools of Destruction mainly because of high definition. This makes the city look much more realistic, and alive with sky traffic everywhere, Ratchet also explores a part of the gigantic city never before seen. Wow this city must be bigger than all of the real world cities combined.

Although Kerwan appeared to be an enormous city-world like Coruscant in Star Wars in the original Ratchet and Clank, it became a lush planet with large oceans and continents in Ratchet and Clank: Up Your Arsenal. In Tools of Destruction it looked like a red planet in the distance as Ratchet & Clank took off for the Polaris Galaxy.

Kerwan is also the most feature planet appear in 3 Ratchet and Clank games

Characters on Kerwan

 * Big Al
 * Helga
 * Qwark Bot
 * Dr. Nefarious
 * Lawrence
 * Klunk
 * Galactic Rangers
 * Emperor Percival Tachyon

Enemies

 * Blarg Commanders
 * Robodogs
 * Mine Layers
 * Blarg Helicopter Commander
 * Blarg Generators
 * One-Eyed Tyhrranoid v2s
 * One-Eyed Robonoids
 * Three-Eyed Robonoids
 * Robonoid Commanders
 * Tank Bots
 * Giant Klunk
 * Ultra Mechs
 * 'Noid Missile Stations
 * Three-Eyed Tyhrranoids
 * 'Noid Commanders
 * Insectoids
 * Insectoid Swarms
 * Dr. Nefarious
 * Drophid Sentry
 * Drophid Trooper
 * Tesladrone
 * Tachyon Gunship
 * Tachyon Warship
 * Tachyon Walker

Appears in

 * Ratchet & Clank
 * Ratchet & Clank: Up Your Arsenal
 * Ratchet: Deadlocked (Mentioned only)
 * Ratchet & Clank Future: Tools of Destruction