Most enemies in the game are immune the gas rat friendly fire, which is odd as some of them should be vulnerable to it.
For example Chaos and Skaven infantry units are vulnerable to gas while all specials and elites besides berzerkers are immune.
But then there’s this weird inconsistency in which Ungors are immune to gas while gors do take damage from it.
What’s the intention? Are only infantry units supposed to take gas damage? What about elites and specials besides the gas rat?