Both Commander Shepard and Master Chief suddenly find themselves in unfamiliar surroundings different then those from their respective games. They soon realize that though the galaxy isn't theirs they're the best shot at saving it. They have to go through the others three games and survive Master Chief vs Mass Effect 1,2 and 3 and Commander Shepard vs Halo 1,2, and 3. Can Shepard stop the activation of Halo/defeat the Covenant? Can Chief stop the Reapers? Or will they both die?
Commander Shepard starts Halo CE as a fully upgraded soldier (from Mass Effect 3) with the fully upgraded slam ability. He has the melee omni tool from mass effect 3. He starts with the weapons he has from the beginning of Mass Effect 3 but can pick up any weapon along the way. He gets Cortana.
Master Chief starts Mass Effect 1 with an assault rifle, an energy sword, the Halo CE magnum and a shot gun. He can also pick up weapons along the way.
Bonus round *Can Master Chief gain the loyalty of the Normandy Crew and romance mass effect 3 Ashely?*