http://tvtropes.org/pmwiki/pmwiki.php/Laconic/RatchetAndClankBeforeTheNexus
Following
Laconic /
Ratchet & Clank: Before the Nexus
Go To
Ratchet & Clank go mobile once again to grind rails, collect bolts, and shoot enemies in order to stop the Prog twins from kidnapping Terachnoids in this "prelude" to Ratchet & Clank: Into the Nexus.