have you have good night sleep tonight?
or is blue monster is coming to you?
or some scary monster is approaching you...it's rainbow friends
blue monster horror game. you can play it on roblox. and this applications is contains mods rainbow friends horror mod for roblox. you can install and play it. this applications is totally free. you even didnt need robux / robox or gems to play it. just play this game and having fun with it.

Disclaimer :
rainbow friends mod for roblox is not official and not affililate with any roblox corporations.