
Pyramid-Pushing Puzzles.

Complete the first bridge.

Complete all levels in Part I.

Complete the second bridge.

Complete all levels in Part II and earlier.

Complete the third bridge.

Complete all levels in Part III and earlier.

Complete the fourth bridge.

Complete all levels in Part IV and earlier.
Minimum OS *: Windows XP Processor: 1 GHz Memory: 1024 MB RAM Graphics: 256MB DirectX: Version 9.0c Storage: 100 MB available space Recommended OS *: Windows XP Processor: 1.5 GHz Memory: 2048 MB RAM Graphics: 512MB DirectX: Version 9.0c Storage: 100 MB available space
Minimum OS: OS X 10.6 Processor: 1 GHz Memory: 1024 MB RAM Graphics: 256MB Storage: 100 MB available space Recommended OS: OS X 10.6 Processor: 1.5 GHz Memory: 2048 MB RAM Graphics: 512MB Storage: 100 MB available space
Minimum OS: Ubuntu 14 Processor: 1 GHz Memory: 1024 MB RAM Graphics: OpenGL 3 Storage: 100 MB available space Recommended OS: Ubuntu 14 Processor: 1.5 GHz Memory: 2048 MB RAM Graphics: OpenGL 3 Storage: 100 MB available space