Make these achievements to unlock the following things:
Old Movie Filter option: Get a 15% game completion
High Contrast Filter option: Get a 100% game completion
Horizontal Flip option: Get a 100% game completion
Artwork gallery: Successfully complete the game
Weta Artworks Environments Part 1: Get a 5% game completion
Weta Artworks Environments Part 2: Get a 25% game completion
Weta Artworks Environments Part 3: Get at least 50,000 points and a 100% game completion
Weta Artworks Creatures: Get a 50% game completion
Weta Artworks Kong Part 1: Get a 75% game completion
Weta Artworks Kong Part 2: Get at least 20,000 points and a 100% game completion
Weta Artworks Kong Part 3: Get at least 100,000 points and a 100% game completion
Weta Artworks Kong Part 4: Get at least 150,000 points and a 100% game completion
Peter Jackson interview: Get at least 75,000 points and a 100% game completion
Save Kong alternate ending sequence: Get at least 250,000 points and a 100% game completion