No missable achievements (plus 12 unknown)
Sign in with Steam or Xbox to track your progress, and:
Kill 10 enemies with an explosive barrel
Blood Seal returned
Suck 1000 litres of blood
Play through any act with a co-op partner
Kill your co-op partner with an explosive barrel twice
Revive your co-op partner 10 times
Kill 10 enemies by pushing them into a pit
All Blood Coins collected