 If you liked
Kyokugen Dasshutsu Adv: Zennin Shibou desu Prologue
|
 ...then you might like
Danganronpa: Kibou no Gakuen to Zetsubou no Koukousei The Animation
|
Both based on Visual Novels. Story based on group of people in closed room. And this people must play in sort of game.
Both anime have a stuffed animal who tells the characters to play a game. Both games are life-or-death, and both anime have a strong sense of mystery, where the characters have no idea what to do.