Upgrade both slots of a weapon in the Single Player Campaign

Kill an Executioner

Covered Market - Beat Korda in the cold storage

Nathaniel - Do not shoot Nathaniel

Sleazy Place - Beat Troy

Father and Son - Follow the schedule with Shaun and put him to bed in a good mood

Kill Hercules

Kill Hermes and acquire his Boots

Sever Gaia’s hand

Cover Kratos in 500 buckets of blood by killing the enemies

Discover the secret 'Hades Arm' room

Kill Poseidon

Defeat Zeus