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