Two gamemode ideas

My first idea for a new gamemode is capture the flag. Capture the flag would be a cool addition to the game because one it would be cool to have more games and two its a game thats not (so far as ive seen) been made already by players so this could be unique. Second is Murder Mystery. Now I haven't been playing this game for super long so I do not know if Murder Mystery has been added. What I do know is that sometimes when I open miniblox there is a Murder Mystery visible in the gamemodes section and it dissapears before im all the way loaded. I just feel like it would be a fun addition the games we have now.