How 'bout this:
There is a something called the Makjah. It controls everyone, even the player. It is fate. When the universe starts, the Makjah is like the CPU of the game - it works out everything, from every atomic movement to whether the bomb will drop
, and as it does, it slowly runs out, until there is non left - the end of the universe. There is no way to change it, unless you have more of the Makjah, which is 'impossible'. Your journey starts in a quest to possess this Makjah, until you learn of the a truth; the Makjah is about to run out soon. In your desperate attempt to create some more of this Makjah, and ultimately save the universe, you will meet friends, foes, allies, enemies, of all sorts. Until, one day, you bring about the end of existance, by means of taking the Makjah from the past, with caused an explosion, and as you die, and time stops, you realize the horrible truth:
You haven't tricked fate.
Fate has tricked you.
Dun dun dun!
Oh, and BTW, don't copy that. The Berne Convention for the Protection of Literary and Artistic acts states that this piece will be copyrighted until I've been dead for 50 years. SCREWED
Excuse me. Yes you. Stop reading my siggy! It is private. Stoppit! Now! I'll kill you! Bleurgh! Go away or I'll format your C-drive! You are dead! I am dead! Yes! Ahem.