In the Hud and Scoreboard is a Counter with per example 500 Units for every Team
Both teams can see the counter of the enemy too.
Every time a Player dies the Counter of his Team go one Down.
On the Map are 5 or more Domination Points (like in Trem Domination Mod).
(Players can Capture them for there team and build a little base around it.)
The Teams got indestructible Bases with one of these Domination points in it.
With every Point a Team is holding the Counter of the Enemy's go a little bit Down every X minutes.
The first team whose count is zero loses.
good:
-No time limit or Sudden Death needed.
-No Camping
-More Action
not so good:
-It is too Easy for Aliens
Against this every player could maybe get a minimum Credits/Evos to keep the balance. And maybe every Team starts with S3 or something that there are no fights naked Rifle vs Tyrant or Dretch vs Luci Bsuit