@RiverRatt - the lower legs look a little too 'plain'. It all depends on what look you are after - and also the amount of screen space the machine is to take up in game. If it were for an overhead view RTS then extra detail would be not noticed anyway. It also depends on the look you are after, ie compare the style of spacecraft in the old starwars movies versus the new ones. The original movies had a more gritty, bulky and mechanical look to them - similar to the robot from Robocop I posted earlier - if that is the style you are going for then more detail is needed. However if you are making it for a game where the technology looks "clean" "crisp" and "shiny" then what you have already done seems okay.
This is merely my opinion however, and I am not an artist.
This is merely my opinion however, and I am not an artist.