Lost my Half-Life 1 product code! What do I do?

Question

I lost my CD key code for Half-Life 1. I played it on my old computer months ago, but my computer crashed and I got a brand new one. I want too play it again, but need to install on the new PC. Problem is I lost the paper sleeve for the disc, but kept the disc in another container. I have the keys to HL: Blueshift and HL: Opposing force, but not the original Half-Life 1. HOW DO I FIND A NEW KEY??

PS. I have thoroughly searched my whole house (and car). Can't find it!

Answer 1

Contact the publisher.