Good Old Games, a G2A-esque website to buy Steam games, currently has a sale going on on the older-styled video games. As of now, there is 24 hours left in the sale.
Some of the games included are RollerCoaster Tycoon Deluxe, RollerCoaster Tycoon 2: Triple Thrill Pack and RollerCoaster Tycoon 3: Platinum! along with some of my favourites being Leisure Suit Larry, Leisure Suit Larry: Love for Sail! and (one that I rented unbeknownst to my parents when I was a teenager) Leisure Suit Larry: Magna Cum Laude: Uncut and Uncensored.
There are a lot of other really good games that other people will enjoy. The prices are really good, too, most of the games being up to 70% off.