×place nikolai on the purple field, weapon pointed NE. the roach will not destroy nikolai and sophie is able to touch a orb and open the low passage to the other orb.

×switch to nikolai to kill roach and back to sophie. sophie is able to reach the left part of the maze and will start the laser. after that switch to chen. you have to go through the water and pass the passage before the laser blocks it. cut every corner, this is a thight race!

×
chen goes into dead end and switches off laser. continue with sophie.

×
now nicolai can follow the path made by the laser and kill the 2nd roach. leave level with sophie.