For SuperTotalCarnage! players, this is a weapon combos guide which explains the items to combine to get upgraded weapons.
Weapons
Will be updating this as I find more. I’m finding this through trial and error and might be wrong, so please let me know if I am.
Pretty sure:
Spree Killer = Mitra (machine gun) + Guanto Saetta (gloves) (increase projectile speed)
Er Metano = Molotov + Sleppa (increase duration weapon effects)
Bajocco = Canne Mozze (shotgun) + Ok capo (toolbox) (reduce cooldown)
Sbarajone = Palla Chiodata (ball-on-chain) + Chiodi daa Croce (nails) (increase damage)
SPATA = The Scrocchi (sword) + Core de sta città (heart) (increase health)
Unsure:
Se Ciao = Bazzuca (bazooka) + Mano di S. Bartolomeo (hands) (increase pickup range)
Disco Inferno = Moooosega (chainsaw) + Lanterna in mano ai cecati (lantern) (increase attack area)
Bombe calde a grappolo = Bombe calde (grenade) + shoes or health regen
Left:
Er Briberòn (bottle) (health regeneration)
Scarpette (shoes) (increase movement speed)
Occhi di S. Lucia (eyes) (increase projectiles)
Capoccia de Papa (skull) (increase XP gain)
Sacra Sindone (shroud) (reduce incoming damage)