Full list of all 19 Tetris Blitz achievements worth 200 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Windows Phone.
Clear a total of 100,000 lines
Get All Xbox LIVE Achievements
Own 10 Power-Ups
Score 500,000, or more points in a single game
Clear a total of 10,000 lines
Drop a total of 10,000 Tetriminos
Clear a total of 150 Tetris line clears
Clear at least 1 line with 10 consecutive piece drops
Trigger three power-ups in the same line clear
Clear 20 lines in a single cascade
Beat previous highscore 5 times
Use each available finisher in at least one game
Earn a cumulative score of 1,000,000 points
Drop 150 Tetriminos in a single game without topping out
Own 5 Power-Ups
Enter frenzy mode five times in one game
Score 100,000 or more points in a single game
Get a Tetris+ with 10 or more lines. (excludes last hurrah)
Clear a single line that contains all seven colors.