Secret Weapon Rune & Secret Boss Guide

All the steps needeed to get to E5MX, Secret Boss level and the secret weapon rune

Full Guide

https://www.youtube.com/watch?v=qjsGfqXcjWw

You have to do all of the following. Don't worry if you missed something, you can do it afterwards from the level select menu. You'll need the two eyes in order to be able to open the moon doors at steps 3 & 4
1. 00:00 In E2M2 Get the 1st eye (needed for Super Secret)
2. 00:15 In E2M2 get the 2nd eye (needed for Super Secret)
3. 00:45 In E2M2 Open Moon Door and get book page
4. 01:15 In E3M2 Open Moon Door and get map
5. 01:26 In E3M2 Get book page from Super Secret
6. 01:41 In E3M3 Talk to Captain at the start of the level to go to E3MX
7. 01:50 In E3MX Ring all 4 bells in the level
8. 02:25 In E3MX Get book page from Super Secret
9. 02:34 In E4M6 Get book page from Super Secret
10. 02:47 In E5M4 Reenter level after defeating boss and use the book (from level select screen)
Then defeat Secret Boss in E5MX to get the secret Weapon Rune Mod

[pagb666]

@Mr Bubbles I guess you should share that in the discussion forums. It worked fine for me.

[Mr Bubbles]

Great guide, as always. However it seems game is not tracking collected book pages correctly. I still get "book missing 4 pages" message.

[pagb666]

@Mesarthim Don't worry if you missed something, you can do everything from the level select menu afterwards

[Mesarthim]

Can you do it separately by selecting levels or do you need to do it in one go accross save files?