Simple Ideas

Good game. Needs some more activities and reasons to split the group up however. Big human groups makes for long endless games.

1) 5 Generators that may be turned on or off. If 4 are on thing's quadrent (top left, bottom right, ect) is revealed. Gives players a reason to split up.

2) Thing can lay eggs. Gives players more things to shoot. If the eggs are left alone too long, can make a very evil spawn. Gives players a reason to split up (to fry eggs).

3) Thing can spawn creep. Creep allows the laying of eggs. Creep gives Thing a bonus.

Like the egg idea, egg spawns shouldnt be very strong at all, but just a little extra dps to help thing. They should take a long ass time to hatch to give marines a chance to kill them, but this would make marines split up.. and would make thing have to reveal more often to lay eggs. which would both be helpful. But eggs werent a part of the movie >.< so I am not sure

Good ideas but I don't think you've watched the movie at all.

it doesnt all have to go by the movie.... but how long would the creep take to spawn? and how far would it go and last

Yeah I didnt watch the movie.

My suggestions are from a pure gameplay / enjoyment point of view. If you want you could rename the game to "Changelings".