Roundabout

First off to unlock this mini game you need to first beat the story. Objectives don't matter you just need to get to the credits. After that select challenges from the main menu and choose Desert Limo.

The classic length is 8 hours. So you must stop the car from veering off the road for 8 hours straight. There is no way to pause it. So settle down for the long haul.

Achievement doesn't pop until after you crash! So after you are at 8 hours on the clock feel free to veer off and claim your achievement!

just a complement to the original solution from Bond 007: the car will accelerate automatically at a constant speed and will be pushed to the left and right sides off the road, and your objective is to prevent that from happening, as you will experience as soon as you start playing. HOWEVER the car changes the direction it's been pushed every so often (at least that happened to me quite a lot during the whole run).

I think it's important to highlight that information because you might feel you are in control of the vehicle tapping the analog stick always to the same direction with the same intensity and all of a sudden the car automatically change direction, thus forcing you to tap the analog stick to the opposite side, and in case you're confident you'll keep the car always on the same side of the road and allow yourself to divert your eyes from the tv for a moment to check your phone for example, that might cost you the game.

On my first try I had 58 min and was playing while watching videos on the ipad and in a moment when the car was being pushed to the left I was pushing it to the right, lightly tapping the stick at a constant pattern between each tap and suddenly when I was looking at the ipad for a second the car changed direction, and since I was steering to the right I helped the vehicle stray from the road faster. So be aware at all times so that doesn't help to you.

And just a heads up: in case you're wondering if 8 hours will be enough to unlock the achievement; YES, IT WILL! As soon as the timer hit the 8h mark the game will freeze for a second like if it's loading something but that's supposed to happen so don't freak out thinking your game crashed lol. I think this is intentional to let the players know when to quit the game.

I did 8h and 1min just to be sure and got the achievement. If you're going for this achievement I HIGHLY recommend you don't exceed the 8h mark because if the game crashes or there's a blackout or something before you have the chance to crash the car after the 8 hours you won't get the achievement. I read a comment from this guy that claimed his game crashed with 10 min remaining to complete the 8 hours, so it's best not to tempt fate.

Good Luck!