What if everything that went wrong on "A Red Letter Day" was not caused by what you thought? What if your teleport ripped a hole in space and time? Now you must travel through time to correct the events and set right your past. Causality Effect A Red Letter Day Gone Wrong
Excellent mod, I'm biased perhaps. If storylines make a game then this one has an excellent premise. To cap it all, it has multiple endings based on your gameplay choices, which is a tricky thing to setup.
All I can say is, try it.