1. Open the game, but STAY ON THE START MENU

2. Tab out of the game and open Date and Time Settings

3. Adjust the time to 4 or 5 hours ahead of your current time

4. Tab into game and hit START. Do not quit the game yet.

5. Once in game, wait a few moments, maybe open a couple packs, then quit.

6. If you didn't get the achievement, repeat this process

Do not attempt this achievement legitimately, it pretty much never works for me and some others claim it has to be idled for many more hours than the description claims.