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Trism is a puzzle game designed around the iPhone's ability to touch the screen and tilt it. The screen is filled with a board of triangles (or 'Trisms'), and the player can clear away Trisms by making three or more of the same color touch. These Trisms then disappear, and more slide on-screen. The direction that the new Trisms slide in from is determined by the position that the player holds the iPhone. A skilled player can use varying directions to their advantage, allowing for combos of multiple Trisms being cleared.

To complicate matters, Trisms occasionally get 'screwed in', meaning that all the Trisms on that row can no longer be moved, and instead must be cleared to restore the row back to normal. Other Trisms may become bombs with timers on them - if the player doesn't clear these dangerous Trisms before the timer runs out, the bomb explodes and it's Game Over!

Trism has three different modes of play:
  • Infinism - play for as long as you can! There's no time limit here, it's just the bombs that can end your game.
  • Terminism - a timed game - keep clearing those Trisms to stay in the game!
  • Syllogism - a puzzle mode where you have a set amount of moves to clear all the Trisms in play.


Trism iPhone Slide the iPhone in the correct direction to solve the puzzle.
Trism iPhone Title screen
Trism iPhone The grey Star Trisms allow you to move a line without it snapping back.
Trism iPhone Sometimes, Rainbow Trisms will be created - these act as wildcards.

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Critic Reviews

148apps Oct 21, 2008 5 Stars5 Stars5 Stars5 Stars5 Stars 100
Slide to Play Aug 30, 2008 4 out of 4 100
Macworld Mar 02, 2011 4 Stars4 Stars4 Stars4 Stars4 Stars 80
IGN Aug 22, 2008 6 out of 10 60
App Spy Jul 13, 2009 3 out of 5 60


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1001 Video Games

Trism appears in the book 1001 Video Games You Must Play Before You Die by General Editor Tony Mott.
Ben K (23888) added Trism (iPhone) on Jan 17, 2009