TETRIS GLOSSARY
KO
Also called Knockout · K.O.
Eliminating an opponent. In Tetris 99, knockouts contribute badge progress; in other games, elimination rewards and credit rules differ.
View in the A–Z glossary →Related terms
Badges →
Tetris 99 rewards knockouts with badge progress that increases attack strength. Taking out a player with collected badges can be especially valuable. Badges in other games may simply be cosmetic achievements.
Attack →
Pressure generated by clears and bonuses in versus play. Attack is measured in garbage lines, which is different from the number of lines you cleared on your own board.