Kill the Leviathan

Successfully complete level 5

Kill 50 Chimera by detonating their heatstacks in the Single Player Campaign

Successfully complete level 4

Kill an enemy with every weapon in the Single Player Campaign

Kill an Impaler

Kill 50 Chimera with Riley's axe in the Single Player Campaign

Kill 100 Chimera with headshots in the Single Player Campaign

Successfully complete level 2

Upgrade both slots of a weapon in the Single Player Campaign

Complete the prologue of Pandemonium of the Oboro Blade.

Reached proficiency level 10 with any weapon type