Deployment

As you'll learn in the tutorial, boosts are powerups that spawn randomly around the map. They don't spawn in random places - they'll always spawn in the same set 5-6 places around the map - but which place and when is random. There are no negative boosts, so you should always grab whatever you see because they are very helpful. During normal gameplay, especially when trying to get 10 kills with each class or one of the other miscellaneous achievements, you're unlikely to collect 15 in a single game. You'll typically be around 10 or so based on my experience. But if you don't have this achievement by the time you finish everything else, start up a match against bots, and I recommend using the Cyclops or Sniper to kill enemies quickest, and just cruise around the map looking for boosts rather than hunting enemies. Once you see which rooms spawn boosts, cycle between those rooms and grab every boost you see. The bots don't always grab boosts so you shouldn't have to worry about them stealing many. Once you actually focus on this achievement you should have no problem doing it first or second try. You could also change your perks to boost movement speed and/or HP to reduce the likelihood of dying while going for boosts.