Possibly as Mint 18 KDE has just got released this month so there may be a repo inconsistancy on Mint 17. I would like to upgrade but AMD proprietery GFX drivers have been deprecated and the open source aren't at an identical level of performance just yet ( I have dual boot Kubuntu 16.04 ).
So 0AD is running on Mint 18 and also a independent repo, brilliant, thanks., I'll try one of these.