I bought the Half Life1 Anthology.... but I cant get it to run. For some reason it boots up this Steam/Valve thing.

Also, I thought HL was an "off-line" game. Is it? or is it an online game?

Any suggestions?

When I click on "Play game" it takes me to a Steam page asking me if I want to buy it..... I'm baffled >

Steam/Valve makes you register their games online through their service. Just walk through the setup - you don't have to pay if you purchased the game already.

Thanks that worked :)