Characters in the game have Attributes including Dexterity, Luck, Strength, Intelligence, and Endurance. A calculated Attribute, Total Constitution, represents hit points. Attributes are generated randomly with 3d6. Characters distribute three points into skills. Most skills are combat-focused.
The Infinity System is perhaps the first published game attempting to support all genres with one core rule set. The rule booklet typically was distributed with a single page errata.