The other solutions here suggesting that you can get it by being in the home page and such are completely false. You must be playing the game to get this achievement.
With that said... I was able to obtain all of the achievements within 21 hours other than the multiplayer ranked achievements and the 24 hour achievement (obviously), and so I had no more of the game to play. While this might not be the case for all, if you fall short, I have a definitive solution!
Go into the title screen, click on 'Tutorial' and load the 'Basic' tutorial. Once you're in, make sure the text in the top-left has gone through one cycle, that you have a plugged-in controller (or one that will last for at least 24 hours or the amount of time you need, I guess), and walk away.
NOTE: You have to exit the match in order to receive the achievement. With that said, you should try to figure out how much time you have left by waiting for the playtime statistic to slide along the ticker on the bottom. If you need proof that this method works, check your time, load it up for a few minutes, then go back and wait for the time stat to come back across.
I give you the Aero guarantee that this will pop using this method! Why the other guys couldn't come up with this, I don't know...
As always, if you have any questions, feel free to PM me.