I really enjoyed this, played it through by myself on extreme and it took the standard 8 hours (ish) i think, what was fun though was that me and my mate then played through it co-op to get the achievements, but we did it on easy.
Basically we were able to run through every level without stopping, shooting as we ran (apart from the chopper level which we had to sit patiently through). Overall took us 1 hour and 4 mins (of actual play time) to complete the entire game.gif)
, pretty sure it can be done faster though we did get shot down a couple times
Basically we were able to run through every level without stopping, shooting as we ran (apart from the chopper level which we had to sit patiently through). Overall took us 1 hour and 4 mins (of actual play time) to complete the entire game
, pretty sure it can be done faster though we did get shot down a couple times 
