Talk about either mods or addons from GameBanana to ModDB!
DEFINITE must have to spice up the gameplay and get your ass kicked (looking at you, Minerva MMod).
Same guy also made one for HL1 which is available straight from Steam, and REALLY spices up the gameplay.
Here’s a mod a recent friend of mine has released, its merely a demo but it’s really good
here’s my review on LambdaGen
Ever wanted Half-Life 2’s weaponry to be fixed with it’s inconsistecies but also consistent with thier Default Models? This pack could be just for you!