Here is the full list of all 22 Hinterhalt 3 achievements.
Win 10 games in normal battles.
Win 40 games in normal battles.
Win 90 games in normal battles.
Win 160 games in normal battles.
Kill 100 zombies in total.
Kill 400 zombies in total.
Kill 900 zombies in total.
Kill 1600 zombies in total.
Kill 500 soldiers with your team in total.
Kill 2000 soldiers with your team in total.
Kill 4500 soldiers with your team in total.
Kill 8000 soldiers with your team in total.
Achieve a team K/D of 1.5 or better.
Achieve a team K/D of 2.0 or better.
Achieve a team K/D of 2.5 or better.
Achieve a team K/D of 3.0 or better.
Achieve a team K/D of 1.5 or better in command mode.
Achieve a team K/D of 2.0 or better in command mode.
Achieve a team K/D of 2.5 or better in command mode.
Achieve a team K/D of 3.0 or better in command mode.
Finish the campaign by winning "ambush" on all maps.
Take a look at the credits to see who developed the game.