This is a post from my subreddit.
Zombies mode
Maps
Moon
Kino
Origins
Revelations
Five
Night of the undead
Swamp of the undead
Older version of Origins
The title screen bonus map (this map for all of the games in my game collection)
The giant
Verruct
The jungle of the undead
Buried
Transzit
Mob of the dead
Die rise
Deriszen drac
Other maps
And my own world and other maps for other future updates
Perks
Quick Revive
Juggernog
Speedy cola
Double tap
Dead shot
Electric cherry
Elemental pop
Tombstone
Phd
Meal punches
Stamina up
Death perception
New perk Explosion damage
Other perks
Weapons
1911b, w,m
Assault rifles
Ray gun
Prototype ray gun
Ice staff,lighting staff,fire staff,wind staff,acid staff,void staff,rock staff,and a default staff
The wonder waffle
Some other Weapons
Collectibles
Weapon upgrades
Craftables
Weapons
Machine upgrades
Perk upgrades
Candy consumables
skill Upgrades
A loot crates with multiple rarities with guarantee Rarities that gives you rewards from all of the games in my game collection
Equipment
Vehicles
Xp
Comic book and book pages
Intel
Other things