Look, if you're going to add Steam to your computer, you already know what it is. We don't offer it as a courtesy install, but you might also consider the GOG Galaxy client. Steam includes its (rather unintrusive) DRM and GOG doesn't have DRM in its client. Great if you want to install games on a system that doesn't have online access.
Developer: Valve Corporation
Instantly access your favorite games
Over 1,100 games are available to purchase, download, and play from any computer. Check out the new releases, indie hits, casual favorites and everything in between.
Join the Steam Community
Find someone to play with, meet up with friends, connect with groups of similar interests, and host and join chats, matches, and tournaments.
Chat with your friends while gaming
See when your friends are online or playing games and easily join the same games together. Chat with your buddies, or use your microphone to communicate in any game.
Automatic game updates
Hunting for patches and downloading from unorganized web sites is so twentieth-century. On Steam, your games stay up-to-date by themselves. No hassles.
Enjoy Steam-only special offers
From pre-release discounts to free-play weekends, Steam delivers what gamers value most.