Hey! I am doing the sluice gates mission and i managed to fix the lever, get a sample BUT i then spazzed out went back to where the mission starts, you know with the code etc. Now when i go back to do it properly and deliver the sample correctly, not only do i have to start the damn thing again, but the lever is gone and i cannot re do the mission and i am therefore stuck...
Any ideas?>/?????please?????????

Hey, I'm having the same problem.
And I tried everything, but nothing seems to work.
The liver handle is gone.

And I don't have any savegames to go back and do it again.
Pfff, I have to do the whole game from the beginning all over again.

Good luck!