Here is the full list of all 15 Desert Bus VR achievements.
Ride along for a complete trip
Join a multiplayer game
Drive the equivalent length of Earth's circumference (24,901mi)
Spend more time on the road than it took to program the game
Play for 10 days
Play for 5 days
Drive the distance from New York City to Los Angeles (2777mi)
Drive the equivalent length of Route 66 (2448mi)
Make it back to Tuscon
Make it to Las Vegas
Kill a poor, innocent bug
Drive ten miles
Get towed all the way to the start
Drive one mile
Start the bus