Call of Duty: Mobile is estimated to have been installed over 20 million times across iOS and Android devices.

The free-to-play game, which officially launched on Tuesday, has also grossed over $2 million to date, according to mobile data tracker Sensor Tower.

Update, October 4: Call of Duty Mobile has been downloaded over 35 million times across iOS and Android devices, according to publisher Activision.

Original story continues: The data includes versions of the game published by Activision and Garena, which holds the rights to distribute developer Tencent’s mobile and PC games in Indonesia, Taiwan, Thailand, the Philippines, Malaysia and Singapore.

Sensor Tower said India leads with 14% of total installs, while the US is at No.9 with 9%.

Call of Duty: Mobile released on Tuesday in all countries where the App Store and Google Play are supported with the exceptions of mainland China, Vietnam and Belgium.

Some users initially experienced problems logging in to play the game due to what Activision labelled “an incredibly high-volume of traffic”, although it said these issues were resolved on Tuesday.

Developed by Tencent’s Timi studio, the game brings together maps, modes, weapons and characters from across the Call of Duty franchise, including the Black Ops and Modern Warfare series.

Prior to the title’s official launch, Call of Duty Mobile controller support was included in the game’s settings, leading many to believe it would be available upon release.

However, Activision subsequently confirmed Call of Duty Mobile controller support had been removed via an update and is no longer available.

Call of Duty: Mobile is playable on PC via Android emulator GameLoop, which offers mouse and keyboard controls plus “exclusive key mapping”.