No way back endings:

"The Traitor" ending:

-You accept the bribe of The Northern Trident and help them in the operation. You kill the administrator and your friends and take control of the facility. For your actions, you become the Right Hand Man of the leader of the Northern Trident.

"Karma is a bitch ay?" ending:

-You follow the same route as "The Traitor" ending but your executions are so violent and cruel and combined with killing anyone associated with Epsilon, The Northern Trident view you now as a threat and they kill you on the spot.

"Complete imperium"(Complete control in latin)ending:

-Again, you follow the same path as "The Traitor" ending but you become so powerful that the leader of the Northern Trident has no use to you.

Once you meet him, you kill him and take control both of Epsilon and The Northern Trident

"Nothing will be the same" ending:

-You help your friends fend of the invading forces and Epsilon comes out victorious, but everyone is affected. Now you help out with the rebuilding of the facility and your friends to overcome the event while trying to not lose yourself in the process.

"End of the line" ending:

-You lose yourself while trying to help with the repairs and your friends. Depression and burnout are at its worse and you cant take it anymore. You resign as the head researcher of the Anomalous Materials team at the facility, and you move on from it, never returning back.

"Two steps ahead" ending:

-You refuse the bribe of The Northen Trident and warn the administrator about it.

You assist in the counter attack of Epsilon against The Northen Trindent which is a succes. For your actions, you are promoted and get the title of "Savior of Epsilon"