Played from an isometric perspective, Jagged Alliance 3 is a turn-based tactics video game in which the player issues commands to a squad of mercenaries.

The game features a roster of 40 mercenaries, including several returning characters such as Vicki Waters, Ivan Dolvich and Fidel Dahan.

[3] Players can access a dynamic campaign map, which will provide more context about each individual turn-based battle, and how the enemy forces react to them as they attempt to retake these territories.

Haemimont Games initially pitched a spin-off project to THQ Nordic, but the publisher was very impressed by the studio's work and instead recruited them to create a mainline sequel instead.

[9] Unlike other strategy games such as the XCOM series, Jagged Alliance 3 will not inform players regarding the chance to hit an opponent or their responses to attack.

The team believed the franchise should be about responding to unpredictable and chaotic combat situations, and an over-abundance of information may cause players to be too cautious and calculating.