Code:
Method : ZTool+SREP+LOLZ
Compression Time : 49 Minutes
Decompression Time : 34 Seconds
Initial Size : 2.06 GB
Final Size : 284 MB
Side Notes : I don't know if the game contains any lz4 streams and by the time i was compressing this game, i didn't realized that there was a Unity precompressor plugin for XTool.