Over all, only one game is known to have a growing subscription base, EVE Online, and in many cases this is a small growth over time. If the enemy doesn't see sneaking on him from behind or his side, then they can not cry to alert his comrades nor could he possess a chance to fireplace his weapon. One final gripe - the final third of the game is 100% carbon copied in the previous game - I'll stay away from the spoilers, but when you've played Uncharted 2, you'll know what I mean if you notice it.