Summary Guide
The easiest way to follow this guide is to concentrate on all achievements in each of the separate sections they are listed under!
The game has 8 game modes and some modes have 2 ways of "Point Counting"
The Game Modes
Marathon: The "Classic" Tetris game. The target is to get as many points as you can in a run to reach level 16 (finish level 15)
Hard Targets to Reach:
Ultra: Play a timed game between 1:00-5:00 minutes and score as many points as you can
No Hard Targets
Cascade: In Cascade the target is to get as many chain reactions as you can!
Hard Target
Big Ol CascadeTriggered 8 or more Cascade Line Clears with a single drop.

Race: Reach your target lines total as fast as you can
Hardest Target
Race Gold MedalCleared 40 lines in under 2:00 playing Race (Single Player).

Score: In score mode the target is get as many points as you can in 4 minutes.
Hardest Achievement in the Game
Hotline: Clear the lines that were marked in the Matrix! The highest line gives the most points
Easy one
Go Low: In go low the target is keep the whole Matrix clear of Tetriminos and Minos.
Easiest Game Mode
Eraser: Clear the highlighted target lines!
Hard Target
Eraser Gold MedalCleared eight target lines in under 1:00 playing Eraser (Single Player).

Misc:
There are three miscellaneous achievements:
Try to clear the top line on the Matrix. To do this, just stack the sides to the top and try to clear the top line with a Line Tetrimino
Simply clear a line either by starting on Level 15 or reaching level 15 in Marathon mode.
Play 100 games. The easiest way to do this is to stack the Tetriminos to the top of the grid to end the game quickly. If you are not good at Tetris this will come naturally.
Point Counting Types
Fixed:
You play through levels 1-15 and finish 10 Lines on each level to reach the next.
In a run through from level 1-15 you will need to finish 150 lines
Variable:
You play through levels 1-15 and on level 1 you need to clear 5 lines to reach level 2, then on level 2 you need to clear 10 lines and so on.
In a run through from level 1-15 you will need to finish 600 lines
THE WALKTHROUGH
Marathon
Settings for the Achievements:
Mode: Marathon
Target: High Score (Fix)
Start Level: 1
Fill Start: None
Fill Rate: Off
Goal System: Variable (if you are not familiar with the game and the Tetrises you need to play to level 13!)
Lockdown: Infinite
Solution:
Target Tetrises or T-Spins!
Tetrises: Fill the FULL Matrix up to 4-12 lines high and leave one column clear. Fill the Clear Line every time it have a height even or above 4 lines with a LINE (Tetris) Tetrimino.
T-Spins: Look it up in the "Score" mode section.
Achievements:
Do as many Tetris or T-Spins as you can and you get the Platinum and all the other Score medals for the Marathon mode!
With the Targeting Settings you will get easily more than 600,000 points!
The Tetris Achievements need a little bit planning and some trial and error!
Fill the FULL matrix with 12 or more lines but leave one column clear!
Save ONE Vertical LINE Tetrimino and now you need to be patient. You can see the next 3 Tetriminos at the TOP of the Matrix. If the next TWO Tetriminos are both vertical lines, use all three in your blank column in a row and voila, you have the second hardest Achievement in the game ;) You will get the following achievements:
Back to BackDid two Tetrises or T-Spins (Single or Double) without clearing any lines in between in Marathon.

The "Legendary" T-spin
The T-Spin needs a little bit of planning and some trial and error!
Here is a video solution for BOTH T-Spin Marathon Achievements!
credit goes to Elem3ntal80
Concentrate on ONE of the three Targets, however if you are VERY familiar with the game you can do ALL the Marathon Achievements in ONE run!
Ultra
Settings for the Achievements:
Mode: Ultra
Target: 1 Minute
Start Level: 10-15 (easiest with 10, fastest with 15)
Fill Start: None
Fill Rate: Off
Goal System: Fixed (not switchable)
Lockdown: Infinite
Solution:
Target Tetrises or T-Spins!
Nothing to say here. Just simply get Tetrises as fast as you can. If you've already gotten
the Ultra Achievements will be a piece of cake for you :)
Cascade
Settings for the Achievements:
Mode: Cascade
Target: High Score
Start Level: 1
Fill Start: None
Fill Rate: Off (High for the All about the Hamiltons achievement)
Goal System: Variable
Lockdown: Infinite
Solution:
Target Tetrises or T-Spins!
These are the same settings as Marathon Mode, except for the mode type and fill rate, which will need to be set to High for an achievement (check out the video below for help with this achievement). The others should be a cake walk.
Check this video out for the Cascade achievement:
If you follow the setup in the video as best as you can you should get the following achievement:
Big Ol CascadeTriggered 8 or more Cascade Line Clears with a single drop.

For the last achievement in this section set the fill rate to HIGH. As always, try to get Tetrises or T-Spins as fast as you can. If you struggle, try to clear the grid first and then start with Tetrises.
Race
Settings for the Achievements:
Mode: Race
Target: 40 Lines
Start Level: 1
Fill Start: None-15 (for me starting with fill rate 15 works the best, but try whatever height you get comfortable with)
Fill Rate: Off
Goal System: Fixed
Lockdown: Infinite
Solution:
This is simple - try to clear 40 lines in under 2:00 Minutes and all the Race achievements will be done. There are no good tips I can give you - just clear one line after another or do it with tetrises. Use whatever method works best for you.
Race Gold MedalCleared 40 lines in under 2:00 playing Race (Single Player).

Hotline
Settings for the Achievements:
Mode: Hotline
Target: High Score
Start Level: 1
Fill Start: None
Fill Rate: Off
Goal System: Variable
Lockdown: Infinite
Solution:
This game mode can become a little bit tricky. You can score more points if you clear one of the highlighted colored lines marked in the grid. The higher the line is and the higher you start a level, the more points you can get. My advice here is to try a high starting level with the blue marked line in the grid.
The target for Gold is 100,000 Points. This can become a little bit frustrating! Practice makes perfect.
Go Low
Settings for the Achievements:
Mode: Go Low
Target: High Score
Start Level: 1
Fill Start: None
Fill Rate: Off
Goal System: Variable
Lockdown: Infinite
Solution:
This game mode is a little bit different to the other game modes. In this mode you have to keep the grid as CLEAR as possible. You get a lot of extra points if you can fully clear the grid. This is only necessary once and needs a lot of skill and some luck. Try to clear the board with every Tetrimino and this should come in 1 to 10 game rounds. If not, focus on clearing a block of 2 to 4 lines at once. If you can manage this, you can get all 4 of the following achievements in one round.
Went LowCleared the Matrix completely playing Go Low.

Eraser
Settings for the Achievements:
Mode: Eraser
Target: 8 Lines
Start Level: 1
Fill Start: None
Fill Rate: Off
Goal System: Fixed
Lockdown: Infinite
Solution:
In this game mode you only have to clear the highlighted white lines in the grid, nothing more nothing less. Start with the lowest and work your way up to the highest. This can be tricky. I got these achievements in about 45 to 55 seconds with these settings. If you can manage to clear all 8 lines in less than a minute you are done with this game mode and are rewarded with these three achievements:
Eraser Gold MedalCleared eight target lines in under 1:00 playing Eraser (Single Player).

SCORE
Settings for the Achievements:
Mode: Score
Target: 25.000 Points
Start Level: 1
Fill Start: None
Fill Rate: Off
Goal System: Fixed
Lockdown: Infinite
Solution:
ONE WORD: T-Spins
These achievements can only be done with a lot of luck and an incredible amount of T-spins. Trust me, it's impossible to get this done without the T-Spin Setup. This is the hardest achievement in the game. If you can get this, you can get easily the full 1000g.
credit for the video goes to Youtuber CecilMcW00t
If you can copy this setup, you are done with all Score achievements.
Online
There are two online achievements
Just play and win an online game. This is best done with a boosting partner.
and
To send a line in Online mode you have to clear 2 or more lines at once. For clearing 2 lines you send 1 line across, for clearing 3 lines you send 2 lines across and with a Tetris you send 3 lines across. Just keep sending lines until the achievement pops.
After that you are done! Well done on a hard-earned 1000G.