The easiest way to obtain this is online with a partner, using the game shown in the road map. Against the AI, play on Classic with a Madness unit placement against a difficulty level 0 opponent. Many madness games can be won or lost in less than 10 moves since the kings are not generally well protected. Note also that when the achievement pops, it actually says you must in in 15, although the description online still says 30. I won in 8, so I can't verify if more than 15 but less than 30 will actually unlock the achievement. You can use the undo feature without voiding the achievement, but the TOTAL number of moves, including those undone, count toward the total displayed on the victory screen.