Any good games under $20

Hi guys, I was wondering, does anyone know of any good games of $20 it can be 25 too but preferably 20 or under.

Counter strike, Elder scrolls, Pillars of Eternity, Tyranny.

garry's mod is a good game. if you like sandbox games )

csgo / rocket league / rust when on sale /garry's mod / try to find some on g2a

Counter strike, Elder scrolls, The Witcher 3, The Witcher 2, Silent Hill

Garry's mod, CS:GO, DBD, and the list goes on, have a look at the steam store.

If you know or have heard about any game but not sure whether to buy or not. Just type the name of the game plus review in search engine like google you will see a lot of useful information.