(This is AniPhobia, but you have the capabilities similar to the Doomguy in Doom 2016) You were teleported from the Lazarus Labs somehow after collecting the BFG-9000 while Samuel Hayden was ranting about how destroying argent energy was a bad idea and Vega was helping you on what to do. You seemed to have appeared in a city of some sorts, and an anime character (your choice, and if there are multiple of it) was running at you violently. (Put Change if you want to use your own scenario)