Game feels very sluggish, audio is seemingly non-existent, the first time I played all the guns were missing textures and the map was obscured by a missing texture that overlays on-top of everything for some reason, and frequently disconnects you for no real reason (sbox bug)
No option to quick swap weapons, forced to go through the hl1 menu
No way to change the sensitivity (I don't want to change sensitivity for the entirety of sbox, let me do it on a per game basis)
Dying also plays a high pitched death sound, not exactly what i want to hear