Thread:Vorknkx/@comment-1915529-20120523190003/@comment-1496755-20120526143250

Indeed, some battles cannot be avoided. Just like the previous final levels, the exit of E4M8 won't be revealed until you win in the boss battle (9 Iron Liches). It's not as hard as it sounds, especially if you use some inventory items ;)

Some of the levels have interesting themes, I think you'll like them.