ok, ty for the info

Hi. I got Backstab achievement with instruction from another user.
Server was my friend. I locked fps for game at 20 fps with NVIDIA drivers, joined the server, killed a friend with a knife, minimized the game and waited 5 minutes for the match to end. Achievement popped up after the end of the match.

Glad we can help.

Thank you for answer.

No idea how I managed to unlock this cursed achievement and why nobody else can unlock this achievement.
I ran this game on a windows emulator called winlator last year when I was on vacation and stabbed my friend at like 1 frame per seconds.

Hi. Please, help. How did you get the achievement Backstab in "Shot In The Dark"?