Alien Rush:
-2 to 6 people play in one game
-You get a Base. Its being raided by hostile aliens.
-Keep the buggers out of the nuclear silo reactor (which is powering the base)
-once the silo's energy reaches critical, the place goes kablooey.
-Endless/set number of waves.
Hard mode:
-Survive for 10 minutes. If you die you get nothing
-If the silo reaches critical, you have 15 seconds to evacuate the base as quickly as you can. If you dont get out, you get nothing.
annd thats a game idea.
i guess.