Origin have updated their On the House deal already so if you missed SimCity 2000, well, you'll have to go buy it instead. Origin are continuing on the trend of classic games though, this time going with Theme Hospital.
Now this was a game that I never actually fully played as a kid as I only had the demo, but now that it is On the House I might actually get around to playing it. Have fun curing wacky illnesses such as the invisible man or inflated head syndrome, amongst others.
Design, maintain and manage a hi-tech hospital facility, making the most of limited resources and turning cures into cash. The Grim Reaper stalks the corridors, the ill have some very odd ailments, and the staff want to play doctors and nurses together. No matter how you look at it, you're in control of a very sick hospital.
There is no indication as to when this deal will be ending so make sure you get a hold of your copy as soon as you can! Hopefully the 1997 classic still runs perfectly on the newer hardware.