Here is the full list of all 12 Polda achievements.
Finish main story.
Finish the game in 1 hour or less.
Listen to at least 2000 whole messages.
Have some fun while playing. And not only with Mrs. Ištok.
Walk at least 10 km.
Read at least 2000 hints.
Teleport yourself at least 2000 times.
Finish the game in 45 minutes or less.
Finish the game in 35 minutes or less.
During the game, connect with the original authors of the game.
Completely bankrupt Pankrác.
Stay undercover and don't reveal yourself.