Is there a Coop Multiplayer in Planning?

Do you have to make a new save to gain the achievements for "finding a shortcut" etc..

https://ibb.co/cF9XH89 For 50 rooms I will lose relics for killing enemies AND for 8 rooms (upon picking up) I will have ONE HP..... are you fk kidding me? ........ what in the world. Are you devs nuts??! OK that's it NEGATIVE REVIEW! That is taking the piss into the barell that made it overflow! - you steal my gold - you dont give me fk info about what anything does "makes you stronger" - your 'riddles' are just braindead - the enemies boring as fk but lets throw tons at ya or none at all (just annoya...

Google search returned absolutely nothing on this. The stupid halo that flies off when you die in there. Does it have any effects at all?

How do I get the achievement "The Cat and the Frog" and others of this kind? I've tried using the teleport and going straight to the dungeon and I've tried going to the dungeon without killing the set too, but it doesn't enable the achievement, is it bugged?...