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