It is the 15th birthday for the original Half Life game today and to celebrate you will be able to buy the modded re-make, Black Mesa, on Steam very soon.
The free version of the mod was released for the first time last year after a long time waiting, and it was announced today that a paid-for version will be coming soon.
Project leader Carlos Montero said that the decision to sell Black Mesa rests on "two key points."
Our decision to sell Black Mesa rests on two key points. One is we believe we can make the game even better by having full access to the Source engine. This lets us tackle and fix limitations instead of working around them. The second is because frankly, our team could really use the financial help.
The plan from from Montero is as follows:
Soon you'll see Black Mesa available on Steam for a relatively low price. But we aren't dropping all support for the free version. In fact shortly after the Steam release there will be a completely new free version of the game. We also plan to open source our maps and some game assets to the modding community!
Purchasing the Steam version of Black Mesa is more about supporting the team and our efforts than anything else. However, the Steam version will include features that the free version simply can not have. We will be paying careful attention to feedback, and you'll have a very real say in how the final game turns out.