ok weird one doom II secret levels guide for anyone who missed them like i did:
1, in MAP15, look for the secret exit, it's tucked away, sooo a guide or careful exploration helps. 2. that takes u to MAP31, a Wolfenstein 3D themed level. 3. MAP31 has another secret exit to MAP32.
MAP32 ends with hanging Commander Keen figures you have to shoot to open teh exit... it's such a weird, affectionate nod to id's history... note: some later re-releases altered these levels, sooo what u see depends on your version. pls help 🙏