Here is the full list of all 51 WWE 2K20 achievements.
UNIVERSE: Activate a potential Rivalry.
2K CENTRAL TOWERS: Clear Roman Reigns' Tower
UNIVERSE: Create a new Major Show in Universe.
Use the Adrenaline Payback to Carry an opponent over your weight class. (PLAY mode against A.I.)
Send your Opponent through a table. (PLAY mode against A.I.)
Perform a Dual Attack in a Mixed Gender Match. (PLAY mode against A.I.)
Finish an opponent without landing a finisher or signature. (PLAY mode against A.I.)
Attack an opponent with the Tripod Foreign Object (PLAY mode against A.I.)
MyPLAYER: Use a Boost in a match.
MyPLAYER: Complete a Side Plate.
Play one Match using Assist Mode. (PLAY mode against A.I.)
CREATIONS: Create your own Arena.
PLAY: Take control of a Superstar and win a Tournament against AI with "DAMAGE RETENTION" enabled.
Win a Royal Rumble as entrant #1 or #2 against AI.(PLAY mode against A.I.)
Defend successfully against elimination in a Royal Rumble match. (PLAY mode against A.I.)
Use Payback Fortify to deflect 1000 total damage.
Break free from a Carry. (PLAY mode against A.I.)
Use Payback Rush to steal 3 finishers in one match.
Win a Title by cashing in your custom MITB. (PLAY mode against A.I.)
Steel Cage: Push off an opponent from atop the Cage. (PLAY mode against A.I.)
Steel Cage: Escape through the door. (PLAY mode against A.I.)
Put your opponent through the top of the cell. (PLAY mode against A.I.)
Defeat your opponent with their own Finisher. (PLAY mode against A.I.)
Finish your opponent using a possum pin. (PLAY mode against A.I.)
Use Payback Low Blow to slow your opponent down. (PLAY mode against A.I.)
Use the Tank buff to minimize damage from your opponent's Finisher. (PLAY mode agaisnt A.I.)
Hit your Finisher immediately after activating Blackout Payback. (PLAY mode against A.I.)
Activate the Run-In Payback. (PLAY mode against A.I.)
Use Payback Spray Poison Mist to your opponent's face. (PLAY mode against A.I.)
Use Payback Instant Recovery to quickly rise after being knocked down. (PLAY mode against A.I.)
MyCAREER: Clear Chapter 18.
MyCAREER: Clear Chapter 10.
SHOWCASE: Clear all matches.
As a Tag Team, perform your Tag Team Move. (PLAY mode against A.I.)
Reverse a Finisher. (PLAY mode against A.I.)
Attack a Groggy Opponent with a Diving Attack from the Top Rope. (PLAY mode against A.I.)
Break out of a Submission without overlapping once. (PLAY mode against A.I.)
ROAD TO GLORY: Win a Main Event in a PPV.
MyPLAYER: Reach Prestige Rank 2.
MyPLAYER TOWERS: Complete one Tower.
MyCAREER: Clear Chapter 4.
STORE: Open a Loot Pack.
MyCAREER: Clear Chapter 1.
Equip a Favorite Foreign Object and grab it from under the apron.
CREATIONS: Create a unique Superstar with their own Move-set, Entrance, and Victory pose.
Win by performing a Pin Combo through a Signature or Finisher. (PLAY mode against A.I.)
ROAD TO GLORY: Win 50 matches.
ROAD TO GLORY: Win 10 matches.
UNIVERSE: Play and Win 50 matches.
UNIVERSE: Complete a year of universe.
UNIVERSE: Complete a Month of Shows.