Here is the complete list of unlockable achievements in Lego Batman 2: DC Super Heroes for the Xbox 360.
There aren’t any secret achievements to unlock in this game.
Arkham Asylum Antics (25) – Complete story level 3
Asylum Assignment (25) – Complete story level 4
Chemical Crisis (25) – Complete story level 5
Chemical Signature (25) – Complete story level 6
City Slicker (35) – Collect all the gold bricks (Single Player Only)
Combo Hero (20) – Do a finishing move
Core Instability (25) – Complete story level 13
Destination Metropolis (25) – Complete story level 8
Down to Earth (25) – Complete story level 10
Dynamic Duo (20) – Play a level in co-op
Extra! Extra! (20) – Collect all the red bricks (Single Player Only)
Girl Power (20) – Unlock all female heroes and villains (Single Player Only)
Gorilla Thriller (20) – Climb to the top of Wayne tower while riding a Gorilla and playing as a female character
Green Lantern’s Light (20) – Defeat Sinestro as Green Lantern
Halfway Through (50) – Get 50% (Single Player Only)
Harboring a Criminal (25) – Complete story level 2
Heroes Unite (25) – Complete story level 15
Inferior Machines (20) – With Brainiac, defeat any LexBot
It’s A Bird… It’s A Plane… (20) – Fly with Superman
Justice League (20) – Unlock all Justice League characters (Single Player Only)
Kal-El Last Son of Krypton (20) – Defeat Zod as Superman
Minikit Hero (20) – Use all the Minikit vehicles
My Hero (50) – Rescue all Citizens in Peril (Single Player Only)
Research and Development (25) – Complete story level 9
Subway Hero (20) – Use the Gotham City Metro
Super Hero (50) – Get Super Hero in all levels (Single Player Only)
Super-Villain (20) – Unlock all the Bosses (Single Player Only)
Team Building (50) – Unlock all characters (Single Player Only)
Test Hero (20) – Test a custom character
The End (70) – Get 100% (Single Player Only)
The House of Luthor (20) – Obtain more than 10,100,000,000 Studs (Single Player Only)
The Next President (25) – Complete story level 12
Theatrical Pursuits (25) – Complete story level 1
Tower Defiance (25) – Complete story level 14
Toy Gotham (20) – Complete the Bonus level
Underground Retreat (25) – Complete story level 11
Unwelcome Guests (25) – Complete story level 7