There's also more than Linux out there for OpenGL use. OSX has more OpenGL support for gaming than Linux at the moment, and in Unigine OSX with OpenGL beats out Winows OpenGL.
The new Cryengine is using OpenGL, Mantle and DirectX. It means a game using it can support all the platforms out there.
TheUnreal 4, and the others can easily switch between DX and OpenGL; while Source 2 is entirely OpenGL.
The they want a larger market share and as shown in the last Valve Developer Conference even the latest OpenGL versions can be used on the likes of Windows XP. XP being the dominant OS in the growing Chinese gaming market, and in their Internet/gaming cafes.
It's about tapping new markets, and selling more copies. Once an engine is multi-platform porting a game using between operating systems becomes much easier. Therefore less costs are involved and more potential sales and profits.
The new Cryengine is using OpenGL, Mantle and DirectX. It means a game using it can support all the platforms out there.
TheUnreal 4, and the others can easily switch between DX and OpenGL; while Source 2 is entirely OpenGL.
The they want a larger market share and as shown in the last Valve Developer Conference even the latest OpenGL versions can be used on the likes of Windows XP. XP being the dominant OS in the growing Chinese gaming market, and in their Internet/gaming cafes.
It's about tapping new markets, and selling more copies. Once an engine is multi-platform porting a game using between operating systems becomes much easier. Therefore less costs are involved and more potential sales and profits.