My idea is based around the ever so popular theme of being unable to die and reset to a previous point when you receive a fatal injury. Or if you happen to reach a set time.

My idea is the following:
One of us would play the main protagonist, preferrably someone with good writing skills. The others would be people who also remember the events, but either only if the protagonist tells them or they cannot act towards changing it. Alternatively the protagonist is the one unable to change the events (maybe locked up) so he/she would have to rely on others to do things in the alloted time.

That is the basic concept, but I also have some more advanced ideas eg.: everyone can turn back time if they die and they must complete a normally suicidal mission after many tries.

Tell me what you think and as always, have a blast!