Does this map require t4m?

As it effects all players, not just purchaser, one might consider making it a power-up drop. Perhaps 30 sec. duration of lower gravity, then set gravity back to normal.

Awesome. I love Stargate. I was bummed that Universe got canceled, but I hear they are going to make a trilogy of Stargate movies soon!

For some reason your pics remind me of Left 4 Dead. ps. I like L4D. =)

Your underground tunnel picture is pretty dark. Please make sure there is sufficient lighting. Other than that looks pretty good.