Took about 2 hours. Still improvable, 6:15 would be easy. The main improvement from the previous world record is from the new strats on the third level. I saved 40 second by simply blasting through a window and doing the objectives from there. Bit of an oversight from the developer lol. Unfortunate that the second level is based on a timer, so really only levels 3 and 4 matter in terms of improving, everything else is pretty simple.