Tetris the Grand Master 3: Terror Instinct
Getting the Grand Master Grade (GM) in the game is rediculous. In earlier TGM games you had to meet certain score and time criteria to reach the GM grade but they took it to another level in this game. Here's an explaination of how to get the GM grade in Tetris the Grand Master 3: Terror Instinct:
"If the player exhausts the potential of all three grade systems (by reaching an S9 internal grade, attaining all nine Section COOLs, and earning at least six grade points in the invisible roll), the player will still only be awarded MasterM. The GrandMaster grade can only be first awarded through a Promotional Exam. Given the requirements to receive an exam, the player's best four performances in their last seven games must all be GrandMaster-worthy. Finally, in addition to clearing enough lines in the staff roll to get GrandMaster, the player must also survive it to pass the exam.
It is not necessary to be currently qualified MasterM in order to receive a GrandMaster promotion.
Once the player has a qualified class of GrandMaster, then the grade can be awarded in normal play, rather than being 'invisibly' converted down to MasterM. However, if the player is later demoted from GrandMaster, they must receive and pass a Promotional Exam again to return to receiving GrandMaster grades."
In order to get GM you have to have 4 games, out of your last 7, that are GM worthy meaning being stupidly fast. Score a lot of points and clearing the invisible tetris section during the credits. This opens up for you exam and you have to do this crazy feat once more to obtain the GM rank.
Only 6 people have done this and only 1 of those are non-japanese.