Complex sentence: In 1987, Tweet designed the game "Ars Magica", a game centered around wizards in the Middle Ages, and in 1992 he designed the game "Over the Edge", which free-form rules and a subjective approach.
Split into simpler sentences: In 1987, Tweet designed the game "Ars Magica", a game centered around wizards in the Middle Ages. In 1992 he designed the game "Over the Edge", which free-form rules and a subjective approach.