Made seashell pose in this update as you asked
Predation - that game I forgot to mention. It gave me inspiration (crazy, amazing animations made with passion) as much as A Walk Home.
Currently purple mist exists only in lore. I think I can do something that should allow it to affect gameplay too. As I recall, the purple mist in Predation acted as an obstacle for the player to choose a different path. Maybe they will make gasmasked enemies whose ability to spray that into character. I can say I plan to add enemy like this in future which may affect player (not instaknock them) and buff other enemies.
Safe area it's game menu where you choosing equipment, look on stats and e t.c. But I also plan something like survivors camp where you may take side/main quests (I think its great idea) and maybe diversify gameplay littly by defending it (implementation may be shitty).
Conditions
Yup, I read Wolf-056's idea, and I like it. Embarassion system must be coded!
Challenges
Sounds not bad. Challenges may appear when game have enough content to unlock it by player.
Thank you Diehard for ideas!