Have you ever sat down and thought to yourself: “Wow, I really wish you could play as Leon S. Kennedy in Doom.”
Well in the unlikely event that you indeed wished for this pairing–you’re in luck! A modder by the name of DooMero has created a 3rd person mod for the original Doom called Doom: The Mercenaries that allows you to play as the Mercenaries characters from Resident Evil 4. It’s pretty freaking wild, just check out the video link below to see what I mean.
You can download the latest version of the mod here. Additionally you’ll also need to use a program like Zandronum installed to get the mod to work properly.
[Source]