In the Doom of Fortress you can use the collected guard batteries to further strengthen your weapons or armor. With the weapon mods you can equip a weapon of your choice with a new modification. Praetor suit points, on the other hand, strengthen the capabilities of your armor, but can also influence the environment. With the extremely useful Guardian Crystals, you can increase your maximum ammunition stock or incorporate more health and armor.

We summarize here which objects you can obtain in the Doom of Fortress by exchanging two guard batteries:

Skin: Classic Doom Marine
Location: Main level - rear

Two weapon mods
Location: 1st basement - rear

Two Praetor Suits
Location: 1st basement - rear

Two guardian crystals
Location: 2nd basement - rear

Praetor attraction
Location: 2nd basement - left

Praetor attraction
Location: 2nd basement - right

Skin: Guardian
Location: Outer wing - left

Skin: Praetor
Location: Outer wing - right