GZDoom Pink Valley.pk3 Third Ending Guide 🎮

There isn’t much information from players about how to get the “third ending.”
This nearly 3 hour long, fully formatted video covers everything, from the beginning (Map03) all the way to the end, where the third ending is shown.

Not doing the third ending, but this is all I did to do to get there.
Commands I used

i_discordrpc 1/true
sv_doubleammo 1/true
sv_itemrespawn 1/true

Chapters:
0:00 My_Name_is_Not_Important
5:34 Show_In_The_Park
11:19 Happy_Last_Year_Of_School
27:29 Panic_in_the_Super
36:33 No_Home
41:06 A_New_Day (2)
50:08 Where's Monono?
53:41 Do Not Open The Box.
55:17 Where's Monono? (2)
1:14:04 EVERYONE ARE FUCKING IDIOTS EXCEPT ME
1:30:42 home
1:55:55 Non-Existent Yellow
2:00:35 Pink
2:12:50 Pink - Secret (Rocket Launcher)
2:23:19 Flesh Cannot Be Replaced
2:33:56 Finale
2:41:50 Boss + Death
2:44:06 Boss + Win
2:46:22 Do Not Open The Box. (2)
2:46:39 The Way Ahead Feels Lonely (D5 - Caretaker)
2:48:53 a_new_day (3) & Secret Ending