Here is the full list of all 16 Buckshot Roulette achievements.
Breakfast of champions.
Use all items in a single turn in 'Double or Nothing'.
Check the leaderboard.
It rains metal here.
Saw off the barrel, shoot yourself, and die.
Uncover a live round with the magnifier and shoot yourself.
Lose more than 1000K in 'Double or Nothing'.
Double your earnings in 'Double or Nothing' and win.
Cash out over 1,000,000 in 'Double or Nothing'.
Start the 'Double or Nothing' mode 10 times.
Cash out immediately in 'Double or Nothing'.
Listen to the music in the nightclub for over a minute.
Successfully shoot yourself with a blank, facing 50/50 odds.
Consume the 'Double or Nothing' pills.
Beat the game.
Deicide.