Possible gas grenade additions
Sleeping gas grenades (midlozam as the active ingredient) makes characters "drowzy" decreasing initiative, dodge, evasion and movement speed, after 10 stacks of drowzy accumulate, they are knocked out similar to tranq bolts
Smoke grenades (coal as active ingredient) makes people within the cloud untargetable but also unable to target others)
Feat: Fast-acting vapors, gas grenades immediately occupy a 2 tile radius upon activation and spread twice as quickly
feat: subtle dispersion: people do not react to your gas grenades (mutually exclusive to the above feat)