What's the most technically impressive 2000s PC game? (Day 29) + PC 1990s final

Board 8

Okay after sleeping on it I'm going to give it to Half-Life 2 . Crysis is wildly impressive and a real technical marvel but honestly so is/was HL2 and that feeling of sheer disbelief upon playing it for the first time has never again been replicated for me.
Let the voice of love take you higher,
With this gathering power, go beyond even time!