Oh, this is old (but very awesome). It's the best MI themed map I've played, with the possibily exception of International House of Mojo for Quake.
The map was actually made in 2004, before Half-life 2 came out (see http://www.jooki.de/melee3d/
A video of Mojo people playing it back in the day: http://www.youtube.com/watch?v=UjLD-lYt-Vc
The creator e-mailed me last year to tell me about that video and the map, and I suggested that we invite him to play a game with us on it, but he was on a holiday for a while, then I went on holiday, then I forgot.
Anyway, it's a really really good map.