I assume you mean for a computer loaded with Windows Vista?
Windows Vista was an operating system that went out of support in 2009.
That being said, there are still games that will run on Vista. However, the number is decreasing. When you look at a game it should have minimum system requirements on it. Below is an example.
CPU: Core i3-550 / Phenom II X4 955
CPU Speed: Info
RAM: 4 GB
OS: Windows 7, Windows 8.1, Windows 10 (64-bit versions only)
Video Card: Nvidia GeForce GTX 460 / Radeon HD 5770 1 GB
Free Disk Space: 20 GB
If you do a Google Search for "Vista Compatible Games" there are a couple of good hits for games. And some of these games were world class at the time and still a lot of fun