From the author's README on Thunderstore

de_vertigo CS2 A custom re-skate conversion of the CS2 map, Vertigo

Know Issues • Initial Lag: The first load-up might run poorly, but restarting your game should fix it. • Texture Issues: Some textures did not convert correctly. • Lighting: The lighting is a work in progress and needs some adjustments.

Installation

Unzip the downloaded folder.
Drag the de_vertigo folder into the mods folder located inside your main skate directory.

Install de vertigo

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

Open ReSkateLauncher.exe and go to MODS.
Search for de vertigo 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.