Tetris The Grand Master

Tetris The Grand Master
Developer(s)	Arika
Publisher(s)	Capcom
Platform(s)	Arcade
Release	1998
Gameplay info
Next pieces	1
Playfield size	10x20
Hold piece	No
Hard drop	No

Tetris: The Grand Master is the first arcade game in Arika's TGM series.

Gameplay

TODO: Make sense of TGM for noobs. I mean seriously, there's score, grade, time, and a non-standard level. It's not even obvious that the whole point is a time attack.

Speed

ARE is fixed at 30 frames.

DAS is fixed at 15 frames.

Lock time is fixed at (somebody look this up).

Line Clear time is fixed at (somebody look this up).

Gravity is dependent on the level, and it ranges as follows: (somebody double check this).

Level	Speed
0 to 199	1/60G to 1/2G
200 to 299	1/60G (yes, it slows down at this point) to 1G
300 to 499	2G to 5G
500 to 999	20G

The player can force constant 20G, by pressing ↓↓↓↓ ↓↓↓↓ C B A before starting the game, though this will exclude their play from the highscore list. Unlike TGM2, the lockdown time, spawn delay and DAS time do not change throughout the game.

Scoring

In TGM1 you get points exclusively for clearing lines. You get more points for clearing more lines at once, with an additional bonus awarded for combos, bravos, and forcing your pieces down. As the level increases line clears increase in value, placing particular importance in the final stretch. Incidentally, for all players good enough to attain S9 score becomes irrelevant. Nevertheless, here is a more technical description of the scoring formula:

Score = ((Level + Lines)/4 + Drop) x Lines x Combo x Bravo

Where:

• Level is the current level you are on.
• Lines is the number of lines you just cleared.
• (Level + Lines)/4 is rounded up.
• Drop is the number of spaces you manually dropped the piece. The last space your piece falls does not contribute to this, however locking the piece once it has landed will add 1 to the Drop.
• Combo returns to 1 by default every time a piece does not clear lines. Otherwise, it is :

  Combo = Combo - 1 + (2 x Lines - 1)

• Bravo is equal to 4 if this piece has cleared the screen, and otherwise is 1.

Grades

In TGM1 grade is entirely determined by score. As you pass certain milestones, TGM will assign you the next grade:

Grade	Required Score	Grade	Required Score
9	0	S1	16,000
8	400	S2	22,000
7	800	S3	30,000
6	1,400	S4	40,000
5	2,000	S5	52,000
4	3,500	S6	66,000
3	5,500	S7	82,000
2	8,000	S8	100,000
1	12,000	S9	120,000
		GM	126,000*

^*In addition to this, to achieve Grand Master rank, the player must reach grade 1 before level 300, grade S4 before level 500, grade S9 before level 999, and level 999 at or before 13:30:00.