|Playfield size||12 × 24|
Combinos is a falling block game similar to Tetris but uses all possible polyominoes from monominoes to decominoes.
Players can compete for a spot on the leaderboard. The top 10 players are shown.
As the player progresses in the game, the game's randomizer uses more polyominoes from more difficult piece sets. The game starts with only the two easiest sets (tetrominoes and lower, and pentominoes), slowly adding hexominoes, heptominoes etc. as the game plays. Every 10 pieces dropped, the randomizer gets a little bit harder, until it becomes effectively unplayable. There are a total of 12,678 possible pieces that can appear, in 29 different colours. Pieces with holes can be found in this game, as can I pieces of length up to 10. All possible I pieces have been seen, with the I1 through I7 appearing often. As of 8th February 2020, the I8 has four known sightings, whilst the I9 and I10 have only one each.
A basic survival mode, the player's aim is to score as many points as possible by clearing lines, especially combo line clears. The scoring system is (L^2)+(C-1), where L is the number of lines and C is the combo. Due to this, a good enough combo can be worth a huge amount of points, making 4-wide one of the most common starting strategies despite it being unreliable due to the randomizer. As of 8th February 2020, the current high score is 641, by Tetrian22.
In battle mode, two players compete. Clearing lines will increase the size of the opponent's next piece.
Up to 5 players can play race mode.