The registered version of Triskele offer several variations. These are changeable via the Options button on the splash screen.
HUMAN (2-player) or COMPUTER: You can play against a friend (in person, not over the Internet, sorry) or against your device. You can set the skill level using the SKILL LEVEL spinner as described below.
FREE PLAY vs RULES: When playing another person, you can specify RULES, which enforces the Triskele rules and win checking, or FREE PLAY, where you select how many tokens you want and the rules are turned off. FREE PLAY is like a real board game: put your tokens where you want, according to your own rules. Play tic-tac-toe, four-across, or anything else you can imagine!
SKILL LEVEL: When playing against the device, you can specify its skill, have it randomize the skill level each game (Level 0), or have it incrementally get stronger each time you win (Level 10). See how far you can get!
TIMER: There is also a TIMED mode: select the number of seconds you have to move. However, the computer will take however much time it wants. (Whoever said computers were fair?)
STACKING: Normally, a square must be empty to move onto it. When STACK is selected, you can place your piece on top of another (only one stack is allowed at a time). When STACKED, the square counts for both players, and either player can move their piece off of it. PIN mode is the same as STACK, only the player underneath (who is “pinned”) cannot move until the piece above is moved off. The square still belongs to both players.
WINNING: You can specify the winning patterns: any combination of orthogonal (left-right, up-down), diagonal, or triskele (three in a triangle pattern, with the top token in the middle or one of the corners). Default is orthogonal + diagonal (like tic-tac-toe).
Enjoy playing Triskele!