From the author's README on Thunderstore

Made by Olay and ported by Stoney.

Sampitheater brought to skate. through ReSkate, featuring a street plaza, rails, ledges, curbs, a DIY area, and night lighting.

Installation

Requires skate. with ReSkate installed.

Install this package through the ReSkate launcher and enable it under Mods. For a manual installation, extract the ZIP contents into their own folder under your game's Mods folder, then enable the map in ReSkate. Select sampitheater by olay from the custom map list.

Keep one installed copy of Sampitheater enabled at a time. Restart ReSkate after installing or updating the map.

Credits

Original Sampitheater map: Olay.
ReSkate port and map adaptations: Stoney.
Porting tools: ReSkate and ReSkate Studio.

The loading artwork is from the map, with the Olay/Stoney credit overlay.

Install Sampitheater

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

Open ReSkateLauncher.exe and go to MODS.
Search for Sampitheater 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.