A max supported OpenGl ES 2 is neither a good starting point for emulating es3. Labels reviewed. The most easies solution for Valve would be to contact Nvidia and ask them to allow chip selection for Half-Life. This topic is about Intel proprietary drivers, there is no hope nor need to see an improvement of Microsoft basic display driver. And maybe if we offer some help that would be bug reporting Intel will show some effort and update the drivers.
nest...