Very cool and good. Smokestacks is definitely the hardest part though haha

You are an absolute sadist for making this mod. Also I swear Smokestacks 5 is impossible. 10/10 would fall again

That's more of a question to SurrealDude, since he's the one behind almost all of the SWF editing in my mods.
The official TEiN Discord server definitely has more information, but in short, you need an Adobe Flash version that supports Actionscript 2 and the base game's FLA file, which was shared by Tyler a long time ago. It's linked in the "TEiN Mods and Modding Resources" spritesheet, pinned in #modding-news and in #resources on my own server, if you're there.

can I ask something? It's probably mentioned somewhere in the discord but... how did you acess swf files? How did you edit them?

Thanks for the comment. Good catch, regarding the tumor you mentioned. I might move it later.

A great and short campaign, I managed to complete it within two hours, with five tumours, after having interacted with all the NPCs before reaching the objective. I personally found the Smokestacks to be the most tricky and difficult.
There's perhaps one small issue with the tumour in Encephalon 2 though. I found it very easy to reach by jumping up and manoeuvring in the air, without having to backtrack from the next room or risking falling further than necessary.

there is an intact corpse at the top!!!

Fantastic mod, really damn hard and really well made
Also, if you use R key. . . You are a coward!

I fucking love necrophilia

This should be a quaint and casual experience that won't be maddening at all. :)