Yuno Gasai: shoot 6+ times from a revolver and do only one grazing hit, but kill at least 15 zombies with SMG using only one clip and being at least 6-tiles away and being on same state when you fired from the revolver which means you must have same skill in handguns and SMG.
Sonozaki Shion: using only a knife and a shocker kill a shoggoth.
Space Station 13 assistant: using a fire extinguisher kill 90 zombies
Space Station 13 security force: get stunned/downed even being in full armor set
Space Station 13 chef: gib a zombie using butcher knife
Space Station 13 medic: having “|” in ALL body parts, make them green using some bandages while zombies are nearer than 15 tiles to you.
Space Station 13 scientist: being enclosed in a circle of zombies take a mininuke, activate it on 2 turns, drop, and, by using teleporter, escape from explosion.
Space Station 13 captain: obtain every Space Station 13 achievements
Akemi Homura: Stop the time with Time Dilation CBM and have at least 35 zombies in your view. While the time is stopped, throw many grenades in this crowd and, when the time start, have all the zombies destroyed.
Running man: (obtained yesterday) sleep and get woken up because a building you sleep in is about to collapse due of fire and run out from collapsing building by running at least 20 tiles.
The best joke ever: a bear or zombear should go inside a car and get lit on fire in there.