The items may have slots that a player can insert "mods" in to enhance their power. Mods can be technology that improves items, but also demonic artifacts and holy items, currently known as relics. Technology mods are more aimed at specific weaponry upgrades, whilst relics are more general in what bonuses they give, such as giving fire damage enhancements regardless of the wielded weapon. It is also believed that game characters may have their own physical slots for similar purposes, and that mods will be removable, unlike in Diablo. Some types are listed below:

Ammo Magazines - Modify the amount, type, range, or accuracy of weapons. Magazines can be magical or technological in nature.

Fuel Tanks - Convey different damage types onto weapons.

Relics - Often considered holy, relics may be part of a greater item or an item previously owned by someone of great ability.

Rockets - Like ammo magazines rockets change the type of ammo a weapon uses while adding an explosive element, often making it more powerful.