How to open BNS
| Name: BNS (Portal Bonus Map Script) | Developer: Valve |
| Supported OS: Windows | Category: Game Files |
What is BNS
BNS file extension or Portal Bonus Map Script is a Game Files.
Below you can find instructions how to download BNS and then open it.
What program opens BNS
File with the BNS file extension can be opened in the operating system Windows.