This mod is set in Games Workshop's, great Warhammer 40,000 ( 40k ) universe. Each map pits Imperial Space Marines against the Tyranid swarm and the Legions of Chaos, competing in a series of mission objectives, culminating in a battle to decide the fate of the planet. Latest scheduled play times and list of servers: steamcommunity.com/groups/exterminatusgame
One on one the Tyranid Warriors "Deathspitter" weapon is not much of a match for the Tactical marine's boltgun, it's splash damage barely making up for it's slow rate of fire and lack of accuracy.
However...
Against a tightly clustered group of marines, it can be quite effective. As seen here on Ichar IV.
Include the option that a marine can spit acid....maybe? Because their saliva is toxic.
But they're wearing helmets.
Well that might prove to be a problem.
If I may correct you on that:
Most, if not all, Loyalist legions had that characteristic removed from them
Only the Chaos legions have it, as far as I can remember.
Some chapters most likely still have it, but only the ones who go crazy on the whole no mutation thing like the Red Scorpions.
the real question is weither the Ultramarines still have it.