1. G2A
G2A is a digital games marketplace that sells all of your favorite games. Their prices are incredible and sometimes hard to beat!
G2A is notorious for protecting their users. In case you are unhappy with your purchase, they have a good protection and refund program.
If you are looking for inexpensive games, then G2A is a good place to check out!
As to the date/time this post was made, they are having a 80% discount on game titles like Overwatched, Call of Duty Infinite Warfare, Watch Dogs 2, Titanfall 2.
Check it out - https://www.g2a.com/r/discount12323
2. Humble Bundle
Humble Bundle is the dream of all fans of indie games. It began by offering bundles of select indie games at a price determined by the purchaser! Yes, you could buy multiple games for under a dollar if you choose to.
From there, the proceeds are split between a charity and the games’ developers. Those charities include the American Red Cross, the Electronic Frontier Foundation, charity: water, Child’s Play, and many, many more.
However, recently, Humble Bundle expanded to include more than just indie games. Moreover, they have a persistent storefront and not just bundles now. They even have a subscription where each month a user will receive a set of games under that month’s specific Humble Bundle theme.
It is truly an innovative service, and because it is so inexpensive, Humble Bundle is definitely worth buying from.
https://www.humblebundle.com/store
3. Kinguin
Kinguin is one of the world’s largest online marketplaces selling video games, software and in-game items. I wouldn't say they are cheaper than the others but they do offer more than just PC Games, XBOX/PS4 Subcscription. Check them out oh one more thing, they are constantly having deals and prices are always dropping.
https://www.kinguin.net?r=28224