One problem about this is that its very hard to hear the sergeant's radio contact because the sound is just too far off the map

I didn't experience such problem when I play-test this. Probably your environment's fault.

my game just crashes every time when I try to load this

Port hl2 new times

Are you supposed to spawn with any weapons?

In the original mod, it will change map that shows you credit list. But GMod Workshop doesn't allow me to upload file that has information about that credit, so it will just show default HL2 credit.
So I've decided to remove that map.

So... yes. You're done after shooting down the Combine Helicopter.

The map is supposed to end after the helicopter fight.

Does the map end after I shoot down the Helicopter? after that there doesn't seem to be anywhere else to go

I experienced a lot air npc bugs example theres one map we kill air npc and door opened I played this short campaing without problem then time bassed and I wished to play again and reilized air npc isint even move from spot I checked comments and reilized recent comments all talking about this problem like map that almost get no update and abandoned got new bugs with new gmod updates idk how its even possble.

About the voice volume of the radio guy, I've tried many things to increase them, but none of them worked. That's why I've suggested to subscribe SSF.
If I have more time, I'll try to discard every single soundscript and play raw sound instead. Maybe it'll help (or not).

Before the upload, I've changed the helicopter's behavior to always move to certain position past the warehouse, to solve that exact issue.

Can you re-run the map and check it, by hiding inside of the warehouse where you acquire Rocket Launcher?
If the changed logic works, it should go past the warehouse and hovers somewhere near the warehouse. If not, that would add another headache to me. :(

I really hate those 'air npcs' because they are very easy to be broken in GMod...

I safely bringed rebels to radio tower or whatever that room they didint let me in is and I got rocket launcher but theres no enemy or something I find to shoot with I even nocliped around for seeing is helicopter or something spawned and stucked no theres nothing. hud sounds are cool btw.

Ah thats why I feel weird about hud sounds. Anyway this radio guy I didint understand shit he talking ambient sound louder than his voice its happen after we pressing radio before radio he is louder than ambient.

Oh, some (not every) sounds were selectively removed (or, reset to default) because they overload default UI sound of GMod.
Some people reported me about wrong sound being played for UI navigation or item pickup while playing other maps, because the add-ons I've published overloads them.

Similar rules were also applied for weapons and pickups too.
Some mods and maps change how weapons and pickups look and work (e.g. Red-dot-sight-less SMG1), but they aren't included in corresponding GMod add-ons.
Some require manual file overwrite, other interfere UX while in other map.

If I can limit the add-ons not to overload things while on other map, just like how HL2 Workshop does, I'll implement it.
But until then, I have no choice but to remove those files selectively from the add-ons, not to heavily overload default GMod stuff.

weapon switch sound, the sound that plays for deleting something in sandbox, crowbar sounds, most of the surface impact sounds, and possibly more i didn't notice

which sound effect?

are the replaced sound effects necessary for this mod? this replaces a lot of the sound effects in the game which isn't mentioned in the description, are they actually needed for the mod to function since this feels a bit intrusive playing anything else

Did not like the transition point between c34 and d9. Especially because previous maps either used an elevator or hallways for transition points between maps.

Other than that, enjoyed this miniature campaign. :D

Could you port the campaign map called 'Liberation' from runthinkshootlive.com to GMod? Thank you.

I've tried many things to increase the voice volume, and make them 'consistent', but nothing has worked.

Another issue is that the guy on the radio is almost impossible to hear but I think that's a Gmod issue

Nvm I figured it out.

I can't reproduce the issue. I've never encountered such issue while testing the map.
I guess your environment has somehow messed it up. Try again with clean state.

Plug in the first map can't be picked up by hand an won't connect to the socket