On mission 8 or 9 when Bloch cuts off the vent fan and the lava starts seepin in what do i do. I have tried mostly everything and i can't get past it. Any help would be greatly appreciated

there is an fmv which shows you your targets - basically you need the guided rockets to shoot the 3 triangle things in the ceiling. *you need to be quick and accurate as you only have time for 4 shots before it gets too hot and you die

Where do i get the guided rocket from

You'll pick up the weapon automatically in the room, then *select the weapon in the usual way.