No missable achievements (plus 17 unknown)
Sign in with Steam or Xbox to track your progress, and:
Your first kill in a game among other human players
Kill some enemies severely injured by another player, while that player is still close to the victim
Get some frags while your health is lower than 15 HP
Complete 25 games
Kill some enemies while being under whiskey's effect
Drop 15 enemy player's hat by shooting over their heads
Kill enemies ending their streak of 7 or more kills
Kill a few Steam friends with bare hands
Kick some enemies into water, fire or a large fall
Kill enemies while reaching 100% overweight due weapon accumulation
Complete 100 games
Kill enemies with dual Colt Walkers
Get some kills with explosive chain reaction effect (their own dynamite kills them)
Make headshots with bow from long range
Pick lit dynamite sticks thrown by other players
Complete 500 games
Get some kills shooting at a lit dynamite