So that's it. I completed the SP mode in 9 hours. I was waiting for it for 3 years, and now it's over.
...
...Until the DLC at least, and I haven't done co-op mode yet.
Mind = Blown. Anyone who enjoys games should experience this game. Instant classic, right there. Well worth the wait, and the hype. (I just wish it wouldn't hold your hand and keep reminding you of the controls all the way through, though - That's a bit patronising)
I feel a little sad for completing it in one sitting rather than taking the time to enjoy it, I don't have any other games to look forward to this year (except for Black Mesa perhaps), but I suppose it's not like I speedran it all the way through.
Semi-spoilerific:
Also now I know why people said the ending was out of place when they had it spoiled for them early by pirates during a leak. It fits in context, but damn... That was weird. But it made me laugh so it's all good.