From the author's README on Thunderstore

Jason Voorhees - Full-Body Costume

A fan-made costume that adds Jason Voorhees to skate. through ReSkate: hockey mask, green work shirt, grey work pants and boots.

Install

Install with the Thunderstore Mod Manager (ReSkate community), then pick the costume in the character customizer.

Notes

Built with ReSkate Studio on the Isaac Clarke full-body costume layout.
The source model's own rig and skin weights were remapped onto the skate. skeleton, including individually rigged fingers (straightened at rest).
Targets the skate. build recorded in .reskate-studio-patch. If the game updates, the mod may need a rebuild.

Credits

Port to skate. / ReSkate: devinzzc
3D model: "jason" by skull-GamerYT, https://sketchfab.com/3d-models/jason-108997898ac241ccb1ee509120e6bb46, licensed under CC BY 4.0 (http://creativecommons.org/licenses/by/4.0/).
Changes from the original: scaled and fitted to the skate. character skeleton, weights remapped to the skate. rig, finger rest pose straightened, textures combined into an atlas, converted to a native ReSkate mod.

This is an unofficial fan mod. It is not affiliated with or endorsed by the owners of the Friday the 13th franchise, the original model's game, Electronic Arts or Full Circle. If you are a rights holder and want it removed, contact the uploader.

Install Jason Voorhees

You need ReSkate and your own copy of skate. on Steam.

Open ReSkateLauncher.exe and go to MODS.
Search for Jason Voorhees and click install. The launcher also installs anything it depends on.
Press PLAY. In game, the MODS tab of the ReSkate menu (Insert) turns it on and off.

Or install it by hand: download the .zip and drop it on the launcher window, or unzip it into its own folder in Mods\ beside Skate.exe.

Maps show up in the ReSkate menu's level list. To join a server running a custom map, you need the same map installed. If the game won't load after installing, see known issues.

skatemods doesn't host or review this mod. The download comes straight from Thunderstore. Only install mods you trust, because scripts can run code.