I just realized this game is missing a pretty obvious feature: The ability to capture and transport hostile creatures. The most obvious benefit to doing this would be for the purposes of studying them.
Perhaps with a sufficient level of medical skill you could perform a vivisection on a live captured organism to provide bonuses to damage or chance to critical hit from having knowledge of a creature’s anatomy. Failure might result in the immediate death of the subject without learning anything, getting hurt by the creature or its outright escape (Imagine a shoggoth or giant mole rat loose inside your base). You could get the same bonuses from dissecting a dead creature, but it might take multiple dissections and a higher skill level to get results.
Another potential feature would be the ability to “interrogate” captured creatures that are supposedly sentient, such as the Mi-Go and Shoggoth, using both the speech and medical skills. Failure might result in no information, no information & death of the subject, or escape of the subject.
You could also have missions to capture the various zombies, mutants, and extradimensional life forms roaming around for the Old Guard. Every lab has holding cells with creatures captured before the cataclysm, why would the government stop? Especially now that it is even more important to understand them to help humanity survive. A mission to capture a Shoggoth or interrogate a Mi-Go would be tricky and interesting.
For the capturing aspect, inflicting heavy damage or using weapons that stun might be required to weaken or incapacitate before capturing it using a net, stasis field, or some other device. Flash freezing the subject with a cryogenic grenade or cryo sprayer might be necessary for the more dangerous or robust lifeforms, such as the Shoggoth.