Shepard and Anderson are tossed into Equestria shortly following the activation of the Crucible super-weapon. Once there, they meet a tribe of buffalo who seem to know exactly who Shepard is.
Frank Horrigan, walking tank and super soldier of the Enclave, ends up in Equestria of all places when he is defeated by the Chosen One. At the end of each chapter, you make the decision for what Frank does in the next chapter!