XO World
Save behavior varies by game. Check the notes below.
Player notes
About this game
Choose any empty square to put down an X. The computer replies with O, and its latest move is highlighted. Win by forming five in a horizontal, vertical or diagonal line.
The Libre Arcade browser edition follows the decision logic of Milan Babuškov’s 2007 XO World applet, including its tactical search. The board and pieces are drawn in the browser.
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Quick tips
Block an open line of four unless you can win immediately.
Build threats in two directions to give the computer a harder choice.
- Arrow keys
- Move the board cursor.
- Enter / Space
- Place an X.
- Pointer / touch
- Click or tap an empty square to play.
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Archive notes
Rights and Source Notes
Browser play is available for this entry. Official project references are listed below.
- Distribution
- GPL-3.0-or-later
- Browser player
- JavaScript · Browser play
- Added to archive
- 2026-11-13
- Official references
- Source code
- Download open-source code packageSource code only; this is not a game ROM download.
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