List of Essential PC Gaming Services

[W130SN]

Steam: Steam (software) - Wikipedia
UPlay: Uplay - Wikipedia
Origin: Origin (digital distribution software) - Wikipedia
GOG: GOG.com - Wikipedia
Humble Bundle: Humble Bundle - Wikipedia

Now please add to the list, which gaming service for PC do you recommend?

 

[Kita]

Kinguin or G2A are also great if you want to save some money.

 

[NameGervin]

Green Man Gaming, I just found that on reddit.