Gloomhaven is a turn-based strategy role-playing video game, developed by Flaming Fowl Studios and published by Asmodee Digital.

Players assume the role of a band of mercenaries exploring dungeons, killing monsters, and fulfilling quests.

The goal is to complete the scenario's main objective, such as defeating all the enemies in the dungeon or surviving a certain number of rounds, all well various side missions, and attempting to complete the primary objective for each mercenary, which reward the player with gold, perks, or experience.

[3] Being a card-based game, each mercenary in Gloomhaven has a unique set of cards that determine all actions that can be made throughout a scenario, including attacking, moving, and looting.

Each card has an initiative number associated with it, which determines the order in which all characters on the board will move, including enemies.

Enemies in the scenarios act in a similar manner, each with their own initiative number, and set actions to perform.

In this respect, cards act as a timer, limiting the number of round a player can perform in a given scenario.

Cards can be enhanced with objects and powerups such as adding additional damage to attacks or increases distance for moving.

In addition to this, players return to the city in-between scenarios where items can be purchased with earned gold to gain an advantage.

In this mode, players explore about the vicinity of the titular city, Gloomhaven including all scenarios from the original board game and 95 missions to complete.

The game initially released with 4 playable characters, a limited number of enemies and classes, and notably lacked a co-op or multiplayer mode.

[21] PC Gamer praised the game's depth and an engaging campaign, but criticized the lack of quality of life features and noted occasional performance issues.