Epic's battle royale behemoth brought in $296m, a rise on March's $223m, across PC, console and mobile.
The title was the fifth highest-grossing PC game for the month, also. The game is clearly in the lead over Playerunknown's Battlegrounds, too. That title has dropped to No.9 in the PC charts.
Meanwhile, Grand Theft Auto V revenue dipped nine per cent year-on-year, something SuperData says marks the first time in 12 months that the game has seen a decline. This is likely partly down to Fortnite.
Dungeon Fighter Online drops one place to No.2 month-on-month, while League of Legends rises one place to the top spot. Hearthstone returns to the Top Ten, at No.6, likely off the back of the new xx expansion pack. Far Cry 5 drops out of chart altogether.
Here is the Top Ten grossing PC games for April 2018:
1. League of Legends, Riot Games
2. Dungeon Fighter Online, Neople
3. Crossfire, Smilegate
4. Fantasy Westward Journey Online II, NetEase
5. Fortnite: Battle Royale, Epic Games
6. World of Warcraft, Blizzard
7. Hearthstone: Heroes of Warcraft, Blizzard
8. World of Tanks, Wargaming
9. Playerunknown's Battlegrounds, PUBG Corp
10. Counter-Strike: Global Offensive, Valve