Duake lets you play Quake as the Doomguy

Wait... wait. This sort of shit is expected, swapping old school fps player characters.

What in the french fried fuck do you mean "spyro in half life"?

Edit: Of course it's Magic Nipples that's making this batshit crazy stuff happen. Here's the Spyro mod's webpage: https://hlyotd.com/

Duake is more than just replacing the player character and calling it a day, it makes additional edits to Episode 1 of Quake to add more new features and make everything work together more seamlessly, among other things.

ModDB page for Duake is here: https://www.moddb.com/mods/duake