The sad thing here... (Destiny)

by Kahzgul, Friday, February 06, 2015, 14:23 (3375 days ago) @ iconicbanana

...is that Destiny has time-traveling enemies built into the game (the Vex), so explaining being able to re-play a strike would be incredibly simple.

"We know from the defeat of the Vex at the Vault of Glass that there are millions of versions of the timestream. The battle here is bigger than just our Universe, Guardian. It's for all Universes. That's right. Plural. So we're using the vex technology to send you into combat in another dimension. It's a familiar fight for you by now: Find and kill Sepiks Prime. Help the humans in that timestream, and they may one day help us in return. Good luck, Guardian."

Bam. Persistent world explained.