For a single run... i actually tried this right around when i completed all of the levels... i have some recorded on tape... never finished it all, that would be ridiculous, but the furthest i ever got was to silo.. did that once.. i got past runway i think 20+ times, got past surface 1 ... once... then bunker 1 is cake ... each level had horrible times... when i got to silo it was like 10 minute dam, 1:45 facility, 1:20ish runway.. surface 1 was around 2:30 .. then i died not a minute into silo... i thought maybe i was the first person to do the first row of levels but never knew ... i asked garrett and he said that he got past runway once just messing around but thought it was way to impossible.
damn isnt to bad if you know strats... facility... with good doak is cake... runway, isnt to bad... problems occure when you get to surface 1... luckily bunker is right after that (bunker 1 you can take all the time you want) then silo is ridiculous to do on your first try... my overall goal was to get through the 2nd group of levels but that would be rough... but yeah i spent maybe 2 days trying to do this... dam facility and runway takes about 15 minutes on average overall << which is all easy until surface.. so that ruins everything.