Proving Grounds is a TDM modification for Natural Selection 2. It focuses on First Person combat, without the RTS elements of the full game. Currently in alpha development, the mod will eventually feature multiple modes and full customisation of characters and models. This will be updated as more media becomes available.
These are the buy menu's, accessed by pressing 'b' as default. Items show as available if you have enough resources, items have a red overlay if you cannot afford them.