Valve explained Steam's Top 10 list last week.
On Steam you can look at the full list of 10 top-selling games from below:
1-Monster Hunter: World
2-PLAYERUNKNOWN’S BATTLEGROUNDS
3-Islands of Nyne: Battle Royale
4-Event Pass: Sanhok
5-Grand Theft Auto V
6-Jurassic World Evolution
7-Raft
8-Monster Hunter: World – Deluxe Kit
9-Counter-Strike: Global Offensive
10-Planet Coaster