While repacks are often used for solo play, the official version supports online co-op for up to 8 players.
This specific version of the game is a compressed "repack" designed to reduce the download size of the original files while maintaining all game data. v1.0.22636r. While repacks are often used for solo play,
If you are looking for details regarding the update including the Steampunk DLC from FitGirl Repacks, Overview of the Content Overview of the Content