Now I'm no numerologist or anything, but everywhere you look in Gameboy Tetris, up pops that number 4! It's like a Stanley Kubrick movie or something. (I'm personally leaning towards 'something'.)
- A lesson in Russian: The words "Tetris" and "tetrad" are evidently derived from the Russian word tetra, which in turn translates into "four".
- Four squares make up each of the seven tetrads. I also reckon that squares have four sides.
- The most lines you can eliminate at once is four. Such a move is, in fact, called a tetris.
- The scores are in multiples of four. Refer to the Points Table.
- There are four different types of background music (including "OFF".)
- A tetrad rotates 90 degrees with a press of the A or B button. Therefore, the A or B button needs to be pressed four times before it makes a complete revolution.
- The Gameboy itself enjoyed popularity for about four years. However, firstname.lastname@example.org disagrees: "Gameboy has been very popular for more than four years. Now, on it's tenth year and making a transition into color; Gameboy has proven itself as the choice of the masses."
- Older Gameboys contain four batteries, have four screws in the back, have four buttons, and four arrow keys.
- According to Emily Winslow, the highest level one can reach is 20 (4 times 5). However, others have claimed levels (not counting the Heart Levels) as high as 29.
- There are four different rockets. For heart-throbbing pics of each, check out the Spoilers at your own risk.