This can be cheesed by hosting a local/VPN multiplayer game against the AI, saving on the turn before you win and reloading/winning on that same save thirty times. Be aware that multiplayer savegames don't show up in the "Load Game" list of the main menu, instead they can be found only after you start hosting a multiplayer game under "Host Saved Game" on the "Select Game Type" screen. Also, for some reason Steam didn't update my number of wins immediately when I kept reloading and winning, but it did jump to the correct number after I played another full game. So don't panic if you don't see your number of wins increasing, it's just Steam being slow.