Here is the full list of all 31 Blood Bowl 2 achievements.
You have trained a team until it has killed 5 opponents (League or Campaign)
You have reached a Fan Factor of 10
You intercepted opponent's Pass (League or Campaign)
You have a team whose value is greater than 1900
You have hired Cheerleaders for your team
You pushed 3 opposition players off the pitch in the same match (League or Campaign)
You gained an “MVP” mention for a dead player (League or Campaign)
You finished a match with an elf team without incurring any injuries (League or Campaign)
You won a match without conceding a Touchdown (League or Campaign)
You have won a match in a multiplayer league
You have studied the composition of an opposition team
You have lost a player in a match (League or Campaign)
You have faced a coach in a multiplayer league
You have created a team
You have won a match in a solo league
You have hired a member of staff for a team and purchased an enhancement for its stadium
You mutated a Skaven player with the Horns skill
You have taught an Agility skill to a Dwarf player
You have trained a team to a treasury level of 500,000
You have trained a player to level 7
You have improved a stadium to its maximum level
You have levelled up as coach
You have won the first match of the Campaign
You have completed the Campaign and saved the Old World
You have arrived in a competition final
You bought a player in the transfer market
You made Mutated a player by increasing his level
You have bought and fired a player without him even playing a match
You sold a level 7 player on the transfer market
You have reached the maximum level as coach (20)
You have won all the Trophies