Other Survival Games and Modes
Uncharted 2 is a newcomer to the genre offering two styles of survival. While they have a standard game mode against waves of enemies, there's a Gold Rush mode where players need to capture a piece of treasure while surviving against the onslaught. You can earn big points and upgrades in this mode by performing special combos, capturing a lot of treasure, and killing a lot of guys unlocking items to use in the other co-op and multiplayer modes. These modes are only available online.
Resident Evil 5 Mercenaries Mode
Mercenaries mode is similar to Left 4 Dead's survival mode, in that the two players are competing against a clock. Instead of counting up though, the clock counts down. Your goal is to score as many points as possible in that time period and then earn a ranking based on your performance. You'll find special markers throughout the levels which increase the multiplier which is shared between the pair of players. This mode is playable locally and online.
while not a first or third person shooter, Dawn of War 2: The Last stand is being released as free DLC for the game on October 14th. In this mode players can use persistent characters and unlock and earn upgrades as they fend off twenty waves of enemies. The three player co-op mode is only playable online and requires all three players to be present and only one map is playable.
Company of Heroes: Tales of Valor
Another RTS take on survival, there's only one map available as up to four player defend a town against a German invasion. You'll need to survive 16 waves, and in the process upgrade and build additional units. Special structures around the map earn you bonuses, but are capable of being destroyed.
What survival tips do you have for any of these games?