Black Mesa Source - Red Letter Day

[Adny]

While this is great, I'm actually kind of annoyed...okay Valve, it's great you want to remake a classic but come on seriously...where's our HL3, I'd much rather have HL3 then a remake of HL1, but enough being pessimistic, don't look a gift horse in the mouth

This was made by a modding team called Black Mesa, not Valve themselves; I believe Black Mesa spent a few years on this. Also I don't think it's right to consider this a mod; it seems this was made from the ground up on an entirely new engine, but was only designed after the original game.

The sounds, graphics and controls are definitely better though.