Lobotomy Corporation also possessed technology allowing them to extract weapons and armor from the Abnormalities. They say that even those with no experience in combat instantly knew how to wield the equipment right when they held it, and that there was profound potential just waiting to be tapped. (Rumor has it that the once-famed Fixer, the [REDACTED], made use of E.G.O, but... it's only an old wives' tale, surely.) Unfortunately, all E.G.O stored in the Lobotomy Corporation headquarters was lost, but it's since been confirmed that there's still E.G.O to be salvaged from the branches. We can't in our good conscience let those weapons of potential mass destruction carelessly collect dust, can we? Of course, our highly trained staff will recover the E.G.O once you locate them.

Relevant departments predict that your Sinners will be able to manifest E.G.O of their own depending on their course of action. In addition, they expect E.G.O from Abnormalities to be available via emotional attachment. - official site/game lore

E.G.O are basically magical weapons/combat tools used in the Project Moon world that come from Abnormalities and sometimes from one's own being. When it comes to using an Abnormality's power, there is two effects a E.G.O can do, which is its Default attack and a Corrosion attack. Corrosion is a type of possession that happens when the E.G.O is used while the user is in a poor mental state and Corrosion attacks have a chance to be targeted towards the user's own allies. It's usually brief and wears off after one or two attacks. A person's own E.G.O are not impacted by Corrosion and yet it has room to grow in power depending on their life choices...

This list covers Gregor's current E.G.Os as he gains via shop reclaims (Wishing Stars) and canon point updates if applicable. Some effects may differ from the game if they are game breaking in Seasons' setting.