Steam reveals 2017's biggest earners, including The Witcher 3, H1Z1 and PUBG
To compile the list, Valve looked at game sales, in-game transactions, and DLC. It took the top 100 (full list is here) and split them into tiers: platinum for the top 12, gold for the next group, and so on. That means there's no actual ranking. The top 12 earners, in full, were -
- H1Z1
- The Witcher 3
- Divinity: Original Sin 2
- Rainbow Six Siege
- Dota 2
- Ark: Survival Evolved
- Counter Strike:Global Offensive
- GTA V
- Rocket League
- Warframe
- PlayerUnknown's Battlegrounds
- Ghost Recon Wildlands
Valve also published a list of the highest-earning new games of 2017, split by month of their release. That list, which you can view here, contains some more obscure titles that might be worth looking up.
You can also click here for a list of the top earning VR titles and here for the most played games of 2017. Valve wrote a blog post outlining the methodology for each group.