The latest release from Poland's 11bit studios shot to second place in the Steam Top Ten last week.
Dystopian city builder Frostpunk takes the No.2 spot, having sold more than 250,000 copies in its first day and a half on sale.
Third place goes to fellow new title, Battletech from Harebrained Schemes. This title was crowdfunded, meaning there will already have been something of a community waiting to buy the game on launch.
Nier Automata from Square Enix comes in at fourth place after the game's price was slashed in half. This title has been particular popular on PC and is always in the Top Ten when on offer. The game was also a smash hit for both Square Enix and developer PlatinumGames with studio boss Kamiya saying that the project 'saved' the studio.
Ubisoft's Far Cry 5 drops to fifth place from third while TheHunter: Call of the Wild from Avalanche returns to the Top Ten in eighth.
Holding up the bottom of the charts are pre-orders from Creative Assembly's next Total War title and the first entry in its Saga subseries, Thrones of Britannia.
Below is the Steam Top Ten for the week ending April 28th:
1. Playerunknown's Battlegrounds, PUBG Corp
2. Frostpunk, 11bit
3. Battletech, Paradox Interactive
4. Nier: Automata, Square Enix
5. Far Cry 5, Ubisoft
7. Counter-Strike: Global Offensive,Valve
8. TheHunter: Call of the Wild, Avalanche
9. Grand Theft Auto V, Rockstar
10. Total War Saga: Thrones of Britannia (P)