"Unplayed" means that something has not been used or engaged with, usually referring to a game, musical instrument, or performance that has not been played or performed. Full definition
Does it bother you that there's a pile of unplayed games sitting beneath your TV? (kotaku.com)
Joining in is easy: Just come up with a list of unplayed games you've got sitting around, then complete as many as you can before September 1st. (vghangover.com)
I still will pick one just to get my reward, but it will likely go unplayed installed on my Wii U, or at one sit through it to get a few levels in. (vgtribune.com)