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