Honestly, I first saw the title of this prompt and thought of the synth titans, but anyway.
I’m going to lump lots of incidents into one and be a giant cheeseball and say I’d erase every time I’ve ever played Deus Ex, so I could play it for the first time and it’d be all new and wonderful again (not that it isn’t wonderful in replaying, but there’s a different kind of joy in discovering new things).