I know this is late but I hope it's useful.
Baka! - you need to NOT talk to Nicole at the start of the game when she goes to her room, after that don't interact with her at all and you'll get the achievement
Fried or Poached? - I noticed during my play-throughs that the achievements for the endings are all mixed up, just save at the mutation decision and try them all till you get it (I don't remember if you need to get to the credits screen or not for it to count)