It has been a while since we've done one of these, but here are the ten top selling titles on Steam for the week as reported by Valve:
Sid Meier's Civilization VI - New Frontier Pass
The Witcher 3: Wild Hunt - Game of the Year Edition
Terraria
Red Dead Redemption 2
Total War: WARHAMMER II - The Warden & The Paunch
Deep Rock Galactic
Red Dead Redemption 2
Monster Train
Fallout 76
Halo: The Master Chief Collection