Bioshock 2 Bad Ending
One of four endings to Bioshock 2. Sofia Lamb's bombs detonate and cause a section of Rapture to plummet towards a trench. This wounds Subject Delta mortally but he manages to cling to the escape pod. Eleanor kills her mother by preventing her from breathing.
You decide to save yourself, gifting Eleanor your terrible nature when she absorbs your consciousness (memories, conscience etc.) via ADAM extraction. The rain pours down and the corpses of Rapture float to the surface.
To obtain this ending you should harvest and save at least one Little Sister. Choose the Save Myself option when prompted. Sofia Lamb's fate changes if you spare all the characters. If you kill one then she will die.