Global video game sales rose 25 percent year-over-year in May to an estimated $9.1 billion, according to the latest figures by SuperData Research.

The worldwide digital game market saw continued growth on mobile, driven in part by “battle royale mania” sweeping the globe. For example, NetEase’s battle royale title Knives Out didn’t make the charts in April but held the number five spot in May.

Pokémon GO Gears Up For Summer

Pokémon GO enjoyed one of its best months ever in May. Niantic’s hit AR game generated $104 million last month, an increase of 174 percent year-over-year. The player base increased to the highest level since the game’s peak in 2016, SuperData noted, just in time for the usual summer bump that comes when warm weather meets Pokemon hunting outdoors.

As a result of its large engagement in May, Pokémon GO rose three spots on the mobile charts to number four.

Sony Proves That Single-Player’s Still Got It

Detroit: Become Human launched at number six on the console charts in May in terms of digital sales, selling 291,000 digital units at launch. For a brand-new, console-exclusive IP, this is a solid reception, SuperData notes.

While multiplayer and battle royale sweep global platforms and drive revenue, Sony proves once again that single-player isn’t dead. In April, God of War sold an estimated 2.1 million digital units at launch, becoming the largest console exclusive digital launch to date. Kratos’ father and son tale slipped three spots to number five in May.

Fortnite Players Pump The Brakes

Epic Game’s Fortnite hit a new high in May, bringing in a whopping $318 million across all platforms in May—and increase of seven percent from April. The game may have held its number one spot for console (earning an estimated $200 million) but SuperData senses a slow down. Mobile and PC revenue came in flat compared to April, the analyst firm noted.

The Force Is Weak With Star Wars Microtransactions

In April, EA reintroduced paid add-ons to Star Wars: Battlefront II after months of backlash over its original model at launch, which was perceived as “pay-to-win.” Cosmetic purchases can be purchased with Crystals, earned through gameplay or purchased with real money. This time, however, DICE assured fans that in-game currency can only be redeemed for cosmetic items. Credits are earned through in-game activity and can be redeemed toward appearances, as well.

Star Wars: Battlefront II additional content in May fell short of the levels seen across other top games this year.