Remember this Mod is designed for happy triger, suggested to play in More Aliens challange mod with onslaught and enjoy the bloody corpse. I am not a core player who concentrates in speed run play style.

Adjust the weapons below:
Weapons all increase ammo amount or damage, but has significant reload penalty.

Change 22A3-1 Assault Rifle to M41 Pulse weapon.
Change autogun to M56 Smartgun and use normal 20% ammo satchel and unlock class requirement.
Change flamethrower to Alien film flamethrower, nerf.
(thx to YOJIMBO for sounds and skin)

Set 22A7-Z Prototype Assault Rifle as a DMR, unlock class requirement.
Set 22A4-2 Combat Rifle to netter damage.
Add .50cal HMGm can supply by a100% ammo satchel.
Add flechette auto-aim missile launcher for Tech, can refill by a ammo satchel
More Starting Equipment and add amount of carry limit. (thx to O'Nightmare!)

Set Minigun can supply by a 100% ammo satchel, increase ammo amount.
Set Model 35 Pump-action Shotgun to a double barrel shorgun, Increase shotgun pella and ammo reserved.
Set Vindicator, Devastator to use ignite bullet, increase ammo reserve, unlock class requirement.
Set Tesla cannon to higher damage.
Set Marksman Rifle to lower damage but higher fire rate and ammo amount.

Class:
Adjust skill level for marines.

Challange:
1~5X amount of Alien Wave, thx to O'Nightmare.
You can auto regen HP in this stage, and refill sub attack rifle-grenades with ammo satchel .
Fire thrower ignite marines immidately.
Grenades can ignite biomass.

***
I am just a amateur mod author, so dont espect anything big updated, that's over my limited.
Enjoy! Have fun!