Hello there, folks. We're going to help you get the "Level 4" Achievement in Lab Crisis for completing the fourth Level.
This is impossible to miss, as you need to complete Levels to advance through the game.
On Level 4, which looks like this:
Grab the red key, use it to get the yellow key and scientist, then get the blue key, grabbing the final two scientists with it before entering the exit door.
If you want specific inputs to solve Level 4(R = Right, L = Left, U = Up, D = Down)
RRRR RRRR RDDU ULLL LLLU UUDD DRRR RRRR RRRR UUUR RLLL LLRR RDDD LLLL LLUU UUDD DDRR RRRR UUUU U
If you prefer a Video Walkthrough, watch at 4:24 to see me getting this Achievement. The video below will get you all 5000G in Lab Crisis in 20 minutes.