jim-jam bongs said:Equally unpopular sentiment: Half-Life was only significant for being the first FPS where the story and gameplay took place entirely within the same context, without the story being a one-page ripoff of Predator (with Roadhouse stuck in the middle).
Having said that, I'd also say that the shift you've just described in FPS gaming was most certainly because of the success of Half-Life. Some developers evolved by aping specific conventions of Half-Life, such as the method of story-telling.
Still others simply saw how well the game was received and realised that they had just been liberated from the traditions of the genre; from then on, whenever a publisher got nervous that an FPS was too brainy, the developer could point to Half-Life and reply "so what?"
Half-Life was also significant for its incredible support of the mod community and the fact that Valve itself was mainly made up of former modders. Their nurturing of mods like TFC, CS, and DoD lead to an incredibly long sales life for the game and in turn, a new business model. It basically took the modding that was happening with Quake and turned it up to 11.