If you have played Dead Rising 2: Case Zero ? you may know by now there is more than one ending to this DLC/Demo hybrid. How to unlock these alternate endings ? read below.
Dead Rising 2: Case Zero Alternate Endings
You must save all the survivors and collect all the bike parts. Give zombrex to Katey and leave.
You must collect all the bike parts and give the zombrex to Katey before leaving.
Give Katey the zombrex, build the bike but don’t get on it. Let the time run out.
Give Katey the zombrex and don’t build the bike. Let time run out.
Don’t give Katey the zombrex while outside the safehouse.
Ending F (2)
Forget to give Katey zombrex while inside the safehouse.