Natural Selection is considered as one of the best, if not the best Half-Life mod ever made. It was also the most innovative game of its time combining first person shooter with real time strategy in a multiplayer format. It is still played by thousands of players today. This mod can be downloaded for free if you have Half-Life.
With the reputation they`ve gained by making this incredible mod, the developers of the mod attracted investors and created their own video game company. They now have been working on Natural Selection 2 for years and it is looking extremely promising. The game will this time be a standalone game with its own engine designed especially for this game by unknownworlds. Unfortunately, it will not be free. But the pricing is going to be extremely reasonable (20$ for the game alone, 40$ for the premium edition).
You know those greedy large video game companies who release overpriced, low quality, unoriginal, gimmicky and boring video games? Well, Unknown Worlds Entertainment are the opposite of them.