Simple server mod to change tickrate to 128 in CS2.
Use at your own risk!
Create a folder structure like this in your server installation:
Counter-Strike Global Offensive/game/csgo/addons/128tick/bin/win64.
Put server.dll from windows.zip in addons/128tick/bin/win64.
Open Counter-Strike Global Offensive/game/csgo/gameinfo.gi. Put Game csgo/addons/128tick into SearchPaths like so:
You're done!