Complex sentence: Approximately two years after the release of the game, Crack dot Com decided to release the game's source code, as well as the shareware release game data (excluding the sound effects), into the public domain.
Split into simpler sentences: Approximately two years after the release of the game, Crack dot Com decided to release the game's source code. Also the shareware release's game data (excluding the sound effects) was handed into the public domain.