Find yourself with an undeniable pang of nostalgia after today's announcement that Firaxis is working on a new XCOM strategy title? Maybe you've never heard of X-COM before and want to see what all the fuss is about? Perhaps you're confused because the original games were called "X-COM" and the new ones are called "XCOM?"

Steam has you covered on the first two fronts, at very least. Today only, the download service is offering all five of the original X-COM titles for a paltry $5.09. Alternately, if you're really trying to forget X-COM: Enforcer, you can pick up individual titles at $1.69 a pop. And yes, we're just as confused as you are about the lack of a dashed title in the new iterations of the franchise.