It's a damn fine week to be a fan of old-school sim titles. Theme Hospital is free over on Origin right now, and Rollercoaster Tycoon is current £1.12 over at Gamersgate, which includes the base game and the two expansions -- Corkscrew Follies and Loopy Landscapes. Cheers Gooner!
Also, remember that it's 3 for 2 over at Gamersgate today. Buy three games, get the cheapest free.