Here is the full list of all 13 WWE 2K BATTLEGROUNDS achievements.
Perform 20 signature moves
Perform 20 taunts
Perform a pin successfully
Win a Steel Cage match
Fill the crowd bar
Control the ram and feed your opponent to the alligator
Unlock the "Thunderstorm" Power Up
Complete the WrestleMania event
Unlock the Everglades battleground
Win a Gauntlet match against 5 opponents or more
Win a Royal Rumble match with 20 opponents
Pick up a motorcycle and a turnbuckle
Win a Royal Rumble match against 30 opponents in medium difficulty or higher