In Numa Numa Trail, avoid getting hit by the sniper

Eliminate 10 zombies via melee that have been slowed by the Frost Blast Artifact

Eliminate 10 zombies while your damage is increased by the Ring of Fire Artifact

While using the Aether Shroud Artifact, enter the Aether Shroud 5 times with less than 25% health

Reach max level with an operator in Multiplayer (base game operators only)

Eliminate 2500 zombies with a PaP level 3 weapon

Equip 3 Covenants

Obtain the Stone & Metal Object using Chris.

In Stalingrad, hit a halftrack with a Molotov Cocktail

In Campaign, kill enemies with 15 different weapons throughout the game

In Operation Tonga, throw smoke from the anti-tank ditch to provide cover for the charge

Complete the game in less than 2 hours.