Cdkeybay.com is described as 'The platform aims to be the most user friendly and accurate comparison platform for video games and digital downloadable products. powerful product price processing engine is unparalleled in the gaming industry'. There are more than 25 games similar to Cdkeybay.com for a variety of platforms, including Online / Web-based, Mac, Windows, Linux and Android. The best alternative is Steam, which is free. Other Cdkeybay.com like games are Humble Bundle (Paid), GOG GALAXY (Free), Epic Games Store (Free) and Origin (Free).
The gaming Client designed for a convenient purchasing, playing and updating DRM-free games, as well as an online play between gaming platforms, GOG GALAXY is also built with optionality in mind, and a belief that you should own the games you buy
The Epic Games store is now open, featuring games from other developers. Epic's goal is to bring you great games, and to give game developers a better deal: they receive 88% of the money you spend, versus only 70% elsewhere.
Buy awesome games. Pay a fraction of the retail price! Every week we bring you a spectacular new Steam game bundle, saving up to 97% off the normal retail price! Hurry though, each bundle is only available for a limited time.
Very good and clear site for best deals. You can search for current best discounts for a game, set price alerts, looks for historical low prices across multiple stores (not just one) etc. Very customizable alerts.