. . "Most boxes ,tables ,rocks or other surfaces in the original doom3 are merely decorative and no way improve the gameplay. and most in Doom3 is to run from A to B ,and shoot anything that moves.THe enviroments are there just because they are there. just for the graphics ,nothing to do with gameplay. however at least in 1-2 levels there was some kind of puzzles or elevators. and in multiplayer.." . .