Weapons in Ratchet & Clank (PS4)

Most of the weapons originally appeared in one of the previous games:

• OmniWrench 8000: Ratchet & Clank (PS2)
• Pyrocitor: Ratchet & Clank (PS2) 
• Glove of Doom: Ratchet & Clank (PS2)
• Sheepinator: Ratchet & Clank 2
• Bouncer and Heavy Bouncer: Ratchet & Clank 2
• Omega Heavy Bouncer: Ratchet & Clank 3
• Fusion Grenade and Fusion Bomb and Omega Fusion Bomb: Tools of Destruction
• Combustor: Tools of Destruction
• Predator Launcher and Raptor Launcher and Omega Raptor Launcher: Tools of Destruction
• Buzz Blades and Doom Blades and Omega Doom Blades: Tools of Destruction
• Groovitron: Tools of Destruction (as a device) / A Crack in Time (as a weapon: "Groovitron Glove" ammo) 
• Groovibomb and Omega Groovibomb: A Crack in Time (as; "Groovibomb Glove" ammo)
• Mr. Zurkon: Tools of Destruction (as a device) / A Crack in Time (as a weapon)
• Zurkon Jr.: Into the Nexus
• Plasma Striker and Plasma Slayer and Omega Plasma Slayer: A Crack in Time
• Warmonger: All 4 One
• Peacemaker and Omega Peacemaker: Into the Nexus

The game does have several new weapons however

• Lavacitor and Omega Lavacitor
• Apocalypse Glove and Omega Apocalypse Glove
• Goatinator and Omega Goatinator
• Magmabustor and Omega Magmabustor
• Omega Zurkon Jr.
• Proton Drum and Protoclast and Omega Protoclast
• Pixelizer and Pixeliser HD and Omega Pixeliser HD
• RYNO (new PS4 version) and RYNO Xtreme! and Omega RYNO Xtreme!!!

The game does not feature a single weapon that made it's debut in Ratchet: Gladiator, Quest for Booty, or QForce outside of holocard appearances.