here is some info for you for Zombies

 There are 11 unique Covenants in Terra Maledicta each with multiple rarities for a total of 32 upgrades. The initial set of Covenants include:

Bloodlust: Melee attacks do more damage and heal you
Resurrectionist: Revive allies faster
Brain Rot: Chance to turn enemies to your side
Cryofreeze: Chance to slow enemies
Death Blow: Critical kills return bullets to the clip
Ammo Gremlin: Stowed weapons refill ammo from stock automatically
Dead Accurate: Consecutive hits on the same enemy do more damage
Splatterfest: Enemies killed by explosions may explode
Unholy Ground: Deal more damage while stationary
Cull the Weak: Deal more damage to slowed or stunned enemies
Mother Lode: Chance to keep Equipment after using it

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