Here is the full list of all 20 Tango: The Adventure Game achievements.
Talk to the Guard until he tell about your 3 escape attempts.
Used the bedpan with the Guard.
Take a look 4 times to the window outside the cell until the full song reveal.
Use the broom with the light post outside the cell.
Escape the jail.
Make Antonio fall off the chair.
Talk to the sailor about the Transatlantic option 3 times.
Get Mona to help you with your fish.
Tell 3 times the wrong answer to Mona.
Take the 5 fleas with a 30s of margin.
Read all the papers from the RaceTrack scene.
Read the publicity of the RaceTrack, the poster of the streets of la boca, the fair sign day and night and the graffiti.
Finish the cocktail puzzle without any errors.
Take a look in the mirror of your room with the gala cloth.
Take a look the photo of Mona in the Jail and in your room.
Win the Saint puzzle with a 30 seconds margin.
Win the Poker puzzle.
Loss 3 times the Poker puzzle.
Win Tango: The Adventure Game.
Lose 3 times trying to solve the lights puzzle.