To unlock a particular Wrestlemania arena you must play in 30 Years of WrestleMania mode, progress to that year's Wrestlemania, and complete the corresponding objective listed below. Note: While you can also view how to unlock an item in-game, you can only view how to unlock it BEFORE it is unlocked. After that, the caption of how to unlock the item becomes hidden.

Arena	How to unlock
WrestleMania 01	Complete all Historical Objectives for André the Giant vs. Big John Studd.
WrestleMania 02	Complete all Historical Objectives for Hulk Hogan vs. Kong Bundy.
WrestleMania 03	Complete all Historical Objectives for Hulk Hogan vs. André the Giant.
WrestleMania 04	Complete all Historical Objectives for Randy Savage vs. Ted DiBiase.
WrestleMania 05	Complete all Historical Objectives for Hulk Hogan vs. Randy Savage.
WrestleMania 06	Complete all Historical Objectives for Ultimate Warrior vs. Hulk Hogan.
WrestleMania 07	Complete all Historical Objectives for Hulk Hogan vs. Sgt. Slaughter.
WrestleMania 08	Complete all Historical Objectives for Randy Savage vs. Ric Flair.
WrestleMania 09	Complete all Historical Objectives for Yokozuna vs. Bret Hart.
WrestleMania 10	Complete all Historical Objectives for Bret Hart vs. Yokozuna.
WrestleMania 11	Complete all Historical Objectives for Diesel vs. Shawn Michaels.
WrestleMania 12	Complete all Historical Objectives for Undertaker vs. Diesel.
WrestleMania 13	Complete all Historical Objectives for Bret Hart vs. Stone Cold.
WrestleMania 14	Complete all Historical Objectives for Undertaker vs. Kane.
WrestleMania 15	Complete all Historical Objectives for Stone Cold vs. The Rock.
WrestleMania 16	Complete all Historical Objectives for Triple H vs. The Rock vs. Mick Foley vs. Big Show.
WrestleMania 17	Complete all Historical Objectives for Stone Cold vs. The Rock.
WrestleMania 18	Complete all Historical Objectives for The Rock vs. Hollywood Hulk Hogan.
WrestleMania 19	Complete all Historical Objectives for The Rock vs. Stone Cold.
WrestleMania 20	Complete all Historical Objectives for Goldberg vs. Brock Lesnar.
WrestleMania 21	Complete all Historical Objectives for John Cena vs. JBL.
WrestleMania 22	Complete all Historical Objectives for Edge vs. Mick Foley.
WrestleMania 23	Complete all Historical Objectives for Undertaker vs. Batista.
WrestleMania 24	Complete all Historical Objectives for Shawn Michaels vs. Ric Flair.
WrestleMania 25	Complete all Historical Objectives for Triple H vs. Randy Orton.
WrestleMania 26	Complete all Historical Objectives for Chris Jericho vs. Edge.
WrestleMania 27	Complete all Historical Objectives for Edge vs. Alberto Del Rio.
WrestleMania 28	Complete all Historical Objectives for CM Punk vs. Chris Jericho.
WrestleMania 29	Complete all Historical Objectives for Triple H vs. Brock Lesnar.