This map was really annoying to get a completion. You can get the key cards in any order and I decided on red first because you can get a chaingun almost right away. It looks like you might be able to glide through to the exit with just getting one keycard but I couldn't get it to work.

If I play this map again I may try to grab the box of bullets in the secret by the chaingun grab to make the second half of the map easier.

One time save that I didn't do in the run is you can shoot the switch from where you press the button but it seemed a little janky.