Map 1
-The broken bottoms of the glass sheets are a great place to get stuck, especially when crouched. A thin CLIP along the bottom should fix it nicely.
Map 2
-You can get over the railings outdoors and see the ugly parts of the map as well as get stuck in the hole. Not everyone uses their tripmine yet

-One of the rocks spanning a corner on the balcony is nulled on top I think, gives a HOM
Osprey map
-You can grenade jump on to the top and fool around behind the map
-The osprey fight was very easy. The gun is right by the entrance so as soon as you take out the two grunts the osprey is toast. Reinforcements died about halfway down the rope. Maybe put the gun on the other side of the room with some more grunts.
Map after osprey map
-Same problem here, and you can get on the cliffs too. Don't even need to grenade jump - you can surf up the cliffs quite easily
-As you're about to change to the next map, there is a HOM on the left of the wall behind the grate. Looks fine in the next map
Lift shaft map
-You can climb down the ladder into the blackness. It's a bit weird since black looks best if light fades towards it, giving the illusion that there's more the player can't see.
Destroyed SAM map
-I could be sure the gate at the far end of the SAM part (where the osprey was behind) had a button next to it? Maybe not
-If you look on top of the tank at the SAM part the body overlaps the tracks
Hangar map
-I didn't lag at all put was getting 2k wpoly 8k epoly in the hangar. You did a good job optimising the area, only thing I can think of to fix is that the whole sewer is visible from the hangar. Try putting a hint brush near the ladder
-Killing all the grunts without getting noticed is a fun challenge
Overall it was fun to play. I played on Hard without too much difficulty (hardest parts were long grunt battles). The barnacle part was creative too, and I spent a lot of tries at first trying to kill the barnacle and strafe jump to the ledge, good puzzle. The voice acting was also good and very clear.