From the author's README on Thunderstore

Evolution Graffiti Board

From Half Life. The "Evolution" graffiti is a common example of Resistance imagery. It depicts three stages of human evolution, with the first being a "Homonidae-", the second being a "Homo Sapiens Sapiens", and the third being a transhuman Combine Soldier classified as "Homo Sapiens Combinus" with an evolution cycle of merely seven hours, alluding to the Seven Hour War. This artwork was illustrated by Valve artist Eric Kirchmer.

In Game

Board selection.

Credits

By Blauntd. Built with ReSkate Studio.

Install Evolution Board

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

Open ReSkateLauncher.exe and go to MODS.
Search for Evolution Board 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.