2K Games has released this interactive trailer for XCOM: Enemy Unknown that details how the game plays, all while you pick and choose what happens. It's an interactive video, and apparently YouTube now has the tech so that all your choices are reflected in this one embed, rather than pulling up multiple YouTube pages based on your picks.
This is the next best thing to a demo, especially those of you who are waiting to play it on the PlayStation 3 or Xbox 360. PC players can get the XCOM demo now through Steam.
I've been hearing nothing but great things about XCOM for the last few months. Are any of you picking this one up?