Link to his tweet. https://twitter.com/notch/status/246966935970000896
Why is this significant? Markus is a Valve fan, and as such has embraced the very core of Valve’s success. Embracing the modding community with open arms. This very basic fundamental concept seems to be lost on so many developers.
Thank you John Carmack. For inventing the wheel.
Thank you Valve. For giving the wheel immersion and physics.
Thank you Black Mesa Team. For giving us a revisit of these milestones, with graphic splendor.