Shadowrun

You don't necessarilly have to gust your opponent to their death to get this achievement. As long as the wording comes up that you had forced someone to fall to their death it counts toward the achievement. You can do this just from shooting someone as they fall from a high enough elevation that your shots and the combined impact of the fall kills the opponent. Or on certain maps you can just gust someone off the map.

Gusting someone to their death might be tricky, Gust itself does barely any damage at all and online you won't really get the chance to gust a player of a high edge and killing them with the fall.

The best way to get this online or in a boosting lobby is to let the enemy get himself in smoke, and you gust them. When you're doing it legit and damage andother another player enough they will mostly run off in gust and you can insta-kill them while their in smoke. It does a whole lot of damage!

Same goes as in a boosting lobby, just shoot the enemy a few times, let them get in smoke and gust him to death.

Achievement unlocks at the end of the match and remember when doing this in a boosting lobby, it will only count if there's 4 players on each team.

Hope this helps!

Note: Gusting enemies off the map on the map Maelstrom does also count for this. But the other method is still easier I think.

This one, just like the one for strangle, is very easy to boost and wont take much time at all. However, it isnt that hard to get legit. All i did was have gust handy so i could wipe out elves with katanas that just smoke and then run away and hide (like all elves do). Chances are if you have gust handy, and theres an elf on the other team, you can get this in under an hour. You can also get kills for throwing someone off the end of the map, so dont rule that out!