Here is the full list of all 22 Blood Bowl: Chaos Edition achievements.
Win 100 online matches
Win 50 online matches
Win 30 online matches
Kill 10 opponents during your career
Play 100 online matches
Kill 5 opponents during your career
Play 50 online matches
Succeed 20 passes during your career
Succeed 10 passes during your career
Play 20 online matches
Kill an opponent
Win a match without suffering any injury
Win an online match
Win a match without passing the ball
Play 3 online matches
Succeed a pass
Play 1000 online matches
Play 500 online matches
Win a match without letting the opponent touch the ball
Play 2000 online matches
Win 1000 online matches
Win 500 online matches