Infernium, developed by Undercoders, is an adventure game that challenges players to overcome brutal obstacles and enemies in a non-linear gameplay environment. The game is designed to keep players thinking and reconsidering their strategies as they navigate through its 17 interconnected levels filled with traps and enemies. Unlike other adventure games, Infernium does not allow players to kill or damage most of the enemies but instead requires them to find hidden shortcuts to progress. The game has a persistent world where every action has consequences, including death. The game is mod-friendly, making it easy for players to create their own mods or download expansions from the workshop.

The game is accessible to physically disabled, deaf, and colorblind gamers, and has over 14 hours of gameplay. The game comes with a main campaign, multiple endings, and a New Game+ mode. It has 24 achievements and a speedrun clock integrated into it. The game also supports Twitch integration, allowing viewers to vote for events to happen in-game live. The game has robust video settings, making it easy to run even on low-spec computers. The game has stunning visuals that generate a sense of discomfort and anxiety in players, with beautiful environments that are also the most dangerous ones.