Complex sentence: In September 1993, Nightfall released their role-playing game SLA Industries and after releasing their first sourcebook "Karma" in 1994 Nightfall was purchased by Wizards of the Coast (WotC).
Split into simpler sentences: In September 1993, Nightfall released their role-playing game "SLA Industries". After releasing their first sourcebook "Karma" in 1994, Nightfall was purchased by Wizards of the Coast (WotC).