I understand that I need to own Starcraft 2: Wings of Liberty to play Heart of the Swarm, but I'm not sure where my disk is. If I can't find it, do I need to buy WoL again before I can play HotS?
If you purchased this disc version of Heart of the Swarm, it contains everything you need to play, you won't need to install Wings of Liberty first.
If you purchased the digital version, downloading HotS will also get you everything you need for WoL.
You do not need the disc, as you can download StarCraft 2: Wings of Liberty directly from the Battle.Net website:
protected by Community♦ Apr 6 '13 at 23:48
Thank you for your interest in this question. Because it has attracted low-quality answers, posting an answer now requires 10 reputation on this site.
Would you like to answer one of these unanswered questions instead?