: On another aspect, on Easy I don't think lack of enemies makes a whole heap
: of difference does it? Because they pose almost no threat. Maybe they can
: often be pretty much ignored on Normal too, but I'm not sure.

: You sure about that? I'm just thinking, if you don't do a descent, how much
: time does it cost? You'd have to tackle covies for a while, but pretty
: soon you could reach a Ghost or hog, then whizz off to steal the platform
: Banshee, after which you could fly though pretty quick and get to the exit
: door at the twin bridges. Next you'll have some covies to tackle inside,
: but before long you'll be out the other side and can steal another
: Banshee, which can shortcut the remaining journey.

: If this plan was performed fast, I wonder how the time would compare to a
: standard speed run time. Might it be a viable approach for that
: achievement? Or are things really too tight? In any case, it might make an
: interesting speed challenge.
Record pace times for AOTCR are all sub 10 minutes.

Here are my current times (best times are all co-op): https://www.halowaypoint.com/en-us/games/halo-the-master-chief-collection/xbox-one/service-records/players/fuchsdh

If I get Keyes and AOTCR down to 10 minutes each that's sub 3 hours. As is, while I could certainly do better time-wise on them then they are now, and could shave three or four minutes off my other times, the only other serious timeskip would be the very difficult grenade jump up the hangar in T&R or things like Flood bumps on the Library, which are much more difficult to do and practice IMO (since they aren't right at the beginning of a level.)