 In
the blue corridor open the fickering wall near the corner. |
 In
the bedroom, after flooding the room, open the compartment between the
beds. |
 In the red-room
use the light switch to lower one of the columns. |
 After going
down the lift in the yellow area use the switch to send the lift back up,
and to open a room across from the switch. |
 With the mini
remote tank blow up a crack in the wall, then swim out to it. |
 Near the end
go arround behind the exit column. |