Also, Sierra (King's Quest, Space Quest, Gabriel Knight, etc), Knowledge Associates (lots of ancient Edutainment IP, including Mario Teaches Typing and Mario is

Also, Sierra (King's Quest, Space Quest, Gabriel Knight, etc), Knowledge Associates (lots of ancient Edutainment IP, including Mario Teaches Typing and Mario is Missing!), Davidson (Math Blaster and other Edutainment IP), and more. Activision was a massive M&A shop of classic PC games history.