This achievement isn't hard to earn, but it can be time consuming. Your best bet would be to use the easiest difficulty, Chieftain, and then select a civilization. To make it easy on yourself, start from the left and work your way to the right when selecting the next Civilization that you have to use. From there it's just a matter of winning.
The fastest way to do this, is to play the Scenario: Lightning Round on Chieftain and focus on a Technology Win. You only need to research 24 technologies and even fewer because you get a few techs for free at the start of the game. It will usually take 15 minutes per game which is much faster than regular.