Ever wondered how wonderful it would be to port Minecraft to the GoldSrc engine? Well, now it exists! The gameplay should be similar to the alpha/beta versions of Minecraft, so block placing/breaking, health, crafting, smelting, and mobs are going to be in the mod
Keep in mind that this won't fix the sliding physics bug, the weird sky in fullscreen bug, and the ability to run on Xash3D and on cracked HL bug, but...
If you don't want to play a broken game, download Half-Craft 1.0.1