This solution is confirmed only to work with the following versions:
This does not work with version 1.4 or older, or anything after 1.7. It is not confirmed to work with 1.6, but it stands to reason that it might.
If you've got all of the achievements already, and want to finish this game quicker than you normally could, then watch replays of tournaments. Lines cleared while watching tournament replays count towards your total. (Much like how you can earn achievements while watching replays.) Be cautioned if you update your game to a later version, as doing so usually results in your achievement progress being reset.
I started watching the #1 player of a tourney on 5/30. When I started, my achievement progress bar was just before the "t" in Eradicator (around 25K lines). After watching off and on over the day, it was at the last "r." In that time, I cleared maybe 200 lines on my own, so the replays were adding to my progress.
Here's where I was on 5/29/14, 3:45pm: http://tinypic.com/r/246oqvd/8
Here's my progress on 5/30/14 at 3:27pm: http://tinypic.com/r/28andvs/8
The achievement unlocked on 6/1/14, in the middle of a replay, after watching replays for about 3 days straight.
I was using version 1.5, which I got in early April and never updated, as I didn't want my progress reset.
Here's what you need to do, and some tips:
- You can find your version number by selecting "About" under the "?" in the drop-down menu
- Make note of where your progress bar for the achievement currently ends (maybe take a screenshot)
- You'll need to be at least level 11, which is when you unlock the ability to join tournaments
- Look for tournaments with High Speed Cascades, Fast Piece Drop, or Frenzy Mode Always On. These will drastically increase the amount of lines in a two minutes game. If you find a tourney with all three like "Need for Speed," even better.
- Join a tournament, and play normally, trying your best to clear a lot of lines
- Go back into the tournament and scroll through the list of players, pick one with a high score (or the #1 player), and click the purple box next to their name labeled "Watch."
- Sometimes the replays aren't available on the server, or worse, they load incorrectly and the replays are not the original gameplay. You can tell when this happens as the game will continually stack pieces in the top-left corner and not clear lines normally. If either of these happen, you'll need to watch a different replay.
- If you clear a lot of lines when you join the tournament, go ahead and watch your own replay, as there usually aren't any issues with it.
- You can use the fast-forward button to make the replays last less than two minutes
- Watch your progress creep up (Note: This won't increase the line total for the non-Xbox achievement that is for clearing lines.)
You'll still need to "play" the game by watching replays, but you can guarantee yourself a set amount of lines every time, and even play while unattended. Getting 200 lines per replay is much better than getting 100 or less on your own. It's a great way to finish the game off if you're tired of it and have all of the other achievements already.