Complex sentence: Strength governed how much damage a figure could take and the size of weapons which could be used; heavier ones increased the damage one inflicted in combat, while dexterity determined how likely one was to hit one's opponent.
Split into simpler sentences: Strength governed how much damage a figure could take and the size of weapons which could be used; heavier weapons increased the damage one inflicted in combat. Dexterity determined how likely one was to hit one's opponent.