Rise and mine, Mr. Freeman: Early Half-Life levels recreated in Minecraft
Of all the user-made interpretations of Half-Life's doomed resonance cascade in the Black Mesa facility, the version fashioned by Minecraft modder "Xannot" might very well include the first Swiss-cheese-lined test chamber. Really, Xannot's Minecraft-ed Black Mesa appears quite faithful to the original, with explorable hallways, tram rails, and an open-oven microwave.
The mod's forum thread details the ongoing scope of completion (up to the first Houndeye encounter so far) and a handy download link for interested miners. Hopefully, Xannoc will add subsequent portions of Gordon Freeman's journey, as his efforts already look just as ambitious as other noteworthycreations.