Turrets are mounted cannons that appear throughout the Ratchet & Clank series. Many turrets are used by enemies, though Ratchet can also use them himself, often after defeating the enemy previously occupying it.
Ratchet & Clank
The first turret was seen and used on Fort Krontos, Batalia. Blarg were attacking the fortress city using blarg destroyers, and Ratchet "volunteered" to destroy them at the behest of the Commando. Upon reaching the turret platform, he and Clank ran into the Plumber, who was doing maintenance on it. He was reluctant to allow Ratchet to use it, but was convinced by Ratchet to let him try.
On Joba, during "Enter the Megacorp Games", several of the Joba tribesmen made use of turrets along the way to the Megacorp Games. Ratchet defeated the tribesmen occupying them and used them to defeat other tribesmen, with the turret providing protection.
Up Your Arsenal
Ratchet first manned a turret during the Galactic Rangers operation on Marcadia, Operation: IRON SHIELD. In "Turret Command", Ratchet used the plasma turret to destroy the tyhrranoid dropships attacking the presidential palace. Then, in the subsequent mission "Under the Gun", Ratchet defend a group of Rangers that were repairing the turret. The Rangers manned this turret in the final mission of the operation, "Hit n' Run".
On Metropolis, Ratchet manned a turret again for Operation: URBAN STORM in another mission named "Turret Command". Ratchet used the turret to destroy tyhrranoid saucers and dropships, completing the operation.
In the multiplayer mode, several maps contain turrets controllable by players.
Turrets did not appear throughout the singleplayer campaign of Size Matters. Instead they were only featured within the multiplayer maps, and only commonly on the PlayStation Portable version. The Moon Cow Disease map featured a single usable turret near the players' spawn point, and another further inland that was operated by a single pygmy tribesman. The Mega Cannons map's namesake mega cannons also functioned as giant oversized turrets.
Tools of Destruction
Quest for Booty
Turrets would again be used by Space Pirates. Ratchet could also us them against his enemies or blast down doors. Hoolefar Island had a turret called the BS 33 Omegatron Defensive Station, which Ratchet used to destroy the turret cannons of Darkwater's flagship.
A Crack in Time
Full Frontal Assault
In Full Frontal Assault, turrets were used to defend bases. Turrets could be purchased with bolts in Multiplayer and Campaign. The turrets in the game were: the Warmonger Turret, the Pyro Turret, the Cryo Turret and the Combuster Turret. In Multiplayer, the turrets cost less than in Campaign. All turrets would do enough damage to defeat enemies.