How do I use a .bsg file?

vanilla steam bomber with 24 watercannon

uploaded by gri_gri 1 month ago

http://steamcommunity.com/sharedfiles/filedetails/?id=835589203
posted by 1Second 1 month ago
nice map. :D i want it so bad
posted by RIDDIK 1 month ago
draegaste'd
posted by Harry 1 month ago
How did you get that map? Looks like a combo between sky and ground and ground deformation