Kerwan

Kerwan is a bustling planet that is home to the gigantic city of Metropolis. In Deadlocked, Sasha became 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 the first and third game 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, and this new area has railway tracks that were not seen before either and has Ratchet grinding on them and dodging speeding Mag Trains.

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 Tyhrranoid v2s
 * Three-Eyed Robonoids
 * Tyhrranoid Commanders
 * Robonoid Commanders
 * Tank Bots
 * Giant Klunk
 * Ultra Mecha-Tyhrranoid
 * Tyhrranoid Missile Stations
 * Insectoids
 * Insectoid Swarms
 * Dr. Nefarious
 * Drophyd Sentry
 * Drophyd Trooper
 * Tesladrone
 * Tachyon Gunship
 * Tachyon Warship
 * Tachyon Walker

Changes in Appearance
Although Kerwan is the same planet in all three of its appearances, it has undergone possibly the most drastic terrain changes. In the original game, Kerwan strongly resembled Coruscant from Star Wars, with a surface that took on the appearance of a worldwide city. In Up Your Arsenal, Kerwan is depicted as a lush, vegetated world covered in vast oceans. In fact, if you look closely, the landmass in the western hemisphere resembles our real-life North and South Americas. In Tools of Destruction as the duo take off for Polaris it looks like a red deserty world even though Kerwan is not a desert world although it could have a few, it may have other terrain as well, like Coruscant from Star Wars, has mountains.

Appearances

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