Harms Way

Win any race in Single Player and it will unlock. To make it easier, you can switch off bots, after which you only need to finish the race.

For this achievement you simply need to win a single player race, while playing as a gunner I've never had any difficulty getting this achievement, I simply played as you're expected to and have always managed to come first, however if you are having difficulty with this achievement you can select to not play with bots and play as a driver, simply drive round the map and complete the course and upon completing the race you'll unlock this achievement.

An example of this can be seen in the video below, it also explains every achievement in the game and a quick explanation on each.

* ^{Credit to RoosterTeeth for the video}

Here's the guide I used to unlock all the achievements in the game, you should find it very easy to follow; I take no credit whatsoever for the production of this guide.

Here's the guide I used to unlock this achievement in the game, you should find it very easy to follow.