Wall-E with lasergun - Enter WALL-E, EVE, EVE, WALL-E as a password at the options menu.

Accomplish the indicated achievement to get the corresponding number of Gamerscore points:

Power to the City (30 points): Turn on all Power Pylons to enter a secret location in the Welcome to Earth level.
Power to the Axiom (30 points): Free all Reject Bots to enter a secret location in the Good Intentions level.
Boosters Activity (10 points): Complete the activity in the Directive level.
Scan Racer Activity (10 points): Complete the activity in the Directive level.
Junk Buster Activity (10 points): Complete the activity in the Directive level.
Ring Race Activity (10 points): Complete the activity in the Time Together level.
Taking out the Trash Activity (10 points): Complete the activity in the Time Together level.
WALL-E Away Activity (10 points): Complete the activity in the Time Together level.
Special Object, Part 1 (30 points): Collect the Special Object in the Welcome to Earth level.
Special Object, Part 2 (30 points): Collect the Special Object in the Directive level.
Special Object, Part 3 (30 points): Collect the Special Object in the Sandstorm level.
Special Object, Part 4 (30 points): Collect the Special Object in the Life on the Axiom level.
Special Object, Part 5 (30 points): Collect the Special Object in the Good Intentions level.
Special Object, Part 6 (30 points): Collect the Special Object in the Time Together level.
Special Object, Part 7 (30 points): Collect the Special Object in the 100% Unsanitary level.
Special Object, Part 8 (30 points): Collect the Special Object in the Captain's Orders level.
Special Object, Part 9 (30 points): Collect the Special Object in the EVE Loves WALL-E level.
All Concepts (30 points): Get all Sketchbooks in the game.
All Echoes of EVE (30 points): Find all EVE Radios.
All Echoes of WALL-E (30 points): Find all WALL-E Radios.
WALL-E Suitcases (30 points): Find all of WALL-E's costumes in the game.
EVE Suitcases (30 points): Find all of EVE's costumes in the game.
Crushing, Part 1 (25 points): Crush down 100 Basic Cubes.
Crushing, Part 2 (25 points): Crush down 100 Heavy Cubes.
Crushing, Part 3 (25 points): Crush down 100 Charge Cubes.
500 Cubes (30 points): Crush down 500 Cubes in the entire game.
Making of the Game (5 points): Watch the credits.
Total Perseverance, Part 1 (15 points): Beat the Welcome to Earth level without losing all health!
Total Perseverance, Part 2 (15 points): Beat the Directive level without losing all health!
Tunnel Time Trials, Part 1 (15 points): Complete all tunnels in the Directive level without running out of time.
Total Perseverance, Part 3 (15 points): Beat the Sandstorm level without losing all health!
Short Storks (15 points): Complete the Sandstorm level in 30 stork jumps or less.
Total Perseverance, Part 4 (15 points): Beat the Life on the Axiom level without losing all health!
M-O is Easily Distracted (15 points): M-O will clean what is dropped on the floor in the Life on the Axiom level.
Knocking Over Humans (30 points): It's possible that knocking over humans could be advantageous.
Total Perseverance, Part 5 (15 points): Beat the Good Intentions level without losing all health!
The Spoils of Steward (15 points): Clear out the Stewards in the Good Intentions level.
Total Perseverance, Part 6 (15 points): Beat the Time Together level without losing all health!
Tunnel Time Trials, Part 2 (15 points): Complete all tunnels in the Time Together level without running out of time.
Total Perseverance, Part 7 (15 points): Beat the 100% Unsanitary level without losing all health!
Total Perseverance, Part 8 (15 points): Beat the Captain's Orders level without losing all health!
Panicking Protection Procedures (30 points): Avoid taking damage from any humans in the Captain's Orders level.
Super Quick Scanning (30 points): Scan all WALL-E parts in less than 2 minutes in the EVE Loves WALL-E level.
The Cockroach (5 points): Find the cockroach.
I am the Best! (60 points): Beat the entire game.