Interdimensional adventures - A TF2 X L4D2 crossover

Sabriel is a young woman who's trying to survive in the cruel world of zombie apocalypse. She's doing everything she can to stay alive for one more day. When she meets TF2 mercs- her life changes for better. Will she be able to to develop feelings towards somebody? How will the adventure end? Where will Sabriel end up...