Command and Conquer: Red Alert 2 was a 2D real-time strategy game about a science-fiction alternate universe version of Cold War Allies vs Soviets. The base-building mechanic involved collecting funds from captured neutral structures and harvesting resources throughout the map. Ádám Horváth, a fan of the series, with 3D assets created by an artist who goes by the name Slye_Fox, created a VR implementation in Unreal Engine 4.
The interface implementation is quite interesting in particular. It looks almost like someone hovering over a board game, interfacing with the build menu via a virtual hand-held tablet. The game mechanics look quite complete, with even things like enemy AI and supply crates (although think the camera didn't catch when it was actually picked up) implemented. It definitely looks good, and looks like it could form the basis for a full real-time strategy interface for VR.