Possessioner is primarily a Japanese-style adventure game. The player selects verb commands from a menu and combines them with objects appearing afterwards to interact with the environment and trigger events. Navigation is menu-based as well. The game also contains sporadic turn-based battles against the Possessioners and their minions. Four female combatants have a variety of attacks at their disposal, but the battles are fairly simple and there is no role-playing system. The game contains scenes with nudity and explicit, exclusively lesbian sex scenes.

Possessioner is primarily a Japanese-style adventure game. The player selects verb commands from a menu and combines them with objects appearing afterwards to interact with the environment and trigger events. Navigation is menu-based as well. The game also contains sporadic turn-based battles against the Possessioners and their minions. Four female combatants have a variety of attacks at their disposal, but the battles are fairly simple and there is no role-playing system. The game contains scenes with nudity and explicit, exclusively lesbian sex scenes.