Halo: Combat Evolved - Bungie
I think this is the first time I’ve finished this game. I’ve played it several times before on different platforms but always gave up before the end. There are only ten levels in the game, but a few of them are copies of previous levels that you go through in reverse. It’s clear that the development was rushed, because even within those levels there are sections that are copied over and over to pad out the game. The level called The Library is the one that people normally call out as having done this, but it is pretty common throughout the whole of the game.