Small, furius, and there is no end, just a constant roof-top war. see how long you can live, then see how long you can keep your bodygaurds alive. Just grunts trying to beat you up.
You are Gordon Freeman, or, as only a few people know, Roland Blackheart, a SAS officer with legendary skills. You were working for a foreign government, after you had been sacked from your original posting for disobeying orders.
A single player map for Halflife
Make sure to read the readme file.