Seems like a few companies are celebrating 20th anniversaries lately. Epic is celebrating its 20th anniversary and to commemorate the event they are releasing the "Epic 20th Anniversary Original Soundtrack."

Download it here:
http://epicgames.com/community/epic-20th-anniversary-commemorative-soundtrack/

Its a good sampling of all their games over the 20 years they have been pumping out the hits. To bad they didn't include ZZT.