The Death Knight Game Over is an ending which occurs if Eric(a) loses to Yvette.
Being still within the camp there is no teleportation to save Eric(a), and alone in a hidden area no person to help either. Following their defeat, Eric(a) is brutally mauled to the point of not being recognizable as human. An unknown youth was witness to this, and realizes that Eric(a)'s soul is still lingering within the corpse. Impressed by the soul's strength, they bring Eric(a)'s remains back to their boss.
In a hidden castle back on Earth, the youth (named Zhenya) addresses their boss as Tsar Koschei, and is revealed as having been sent to the camp to spy on Koschei's daughter Marianne. He first questions if Zhenya has raided Marianne's liquor cabinet again when presented with Eric(a)'s bag of remains, until Zhenya explains the matter. Eric(a)'s remains are subsequently remodeled to become a new Death Knight under Koschei's command, though Koschei's priorities such as thinning the waist to increase her sex appeal have Zhenya doubtful as to Eric(a)'s real purpose. Once revived, the reanimation shock leaves Eric(a) rather confused and seemingly amnesiac.
Over the following years Eric(a) becomes one of Koschei's strongest and most successful vassals, a general leading a legion. Zhenya now even refers to her as big sister. Having returned successful once more, she requests a boon of Koschei, asking for less revealing armour or clothing. Koschei replies that armour is actually less defensive than her Death Knight body and also shoots down all her following requests for reasonable clothing items, eventually granting her only the exception of a push-up bra. As Eric(a) begins crying Zhenya pities her, lamenting that their boss is a pervert.