Tetris Forever

To gain this achievement you need to clear 100 line total in a single game of "Electronika 60" the first version of tetris. You can choose green or white version of the game the only change are the color.
Choose english when lauching the game or just know that on the top left is "line" then "level" then "score" form top to bottom.

The achievement does not pop in timewarp mode.

If you are not that good whit speed or stacking here is a quick guide :

Start from level 0 the slowest falling speed and stack on one side the piece making sure to always have a room for a O or a S/Z to not run into a block because the rng is not rng and can be manipulated if you have space for all the type of piece. Just know that focusing on tetris is really hard and you will probably not reach 100 line whit only that.
You want to stay close to the ground and clear single line or double, you dont need point you need to survive the speed.
If you are going to far up in the middle of the screen the speed starts to double so you will not have enouth time to react.