Hey, the way I got it was through a YouTube video. Basically join the discord in the description and follow the instructions, it seems kinda sketch at first because it needs to edit files but it ended up working for me.
The YouTube video: https://youtu.be/0ML6cUnoHjw (it isnt the same one i used but i still got the links, also I recommend following the discord instructions instead of the video, they convey the info very well.)
The only way I know how to get a CD key for WFC costs over 700 dollars soooo.
Btw your english is good, only a couple minor mistakes.

Hello, my nick Mitlor. A couple of days ago you left a comment under my Steam post about "Transformers Fall of Cybertron". Can you play a multiplayer game?! How do you do it?! And forgive my impertinence, do you happen to know how you can get a license key for the "Transformers War of Cybertron"? I write through an interpreter, I don't know English well...

“And thank you random citizen!”

Hey, Happy (belated) Birthday wishes! All the best!

Do not trust Bread, he is a scammer

I wrote a new book you should read it's called 2084