Checkpoints and respawning enemies.
Anyone else finding the checkpoint system in this game extremely irritating? I don't mean the sneaking about to find the things rather the fact that if you've taken out a load of enemies, used a checkpoint and then re-started from it all the dead enemies are re-spawned and on patrol again!
Hopefully this can be fixed with a patch but it seems unbelievable to me that the makers of the game released it with such an obvious bug that seems to be frustrating many gamers, myself included.
Apart from that (significant) grumble, it's a great game, possibly the best in the series.
You've got red on you..