Overwhelm is a unique take on the Metroidvania genre, developed by Ruari O'Sullivan. Here are some of its distinctive features: 1. Reverse power-up system: Unlike most Metroidvanias where the player becomes stronger over time, in Overwhelm, the enemies gain new abilities and become more dangerous as you progress. 2. Limited lives: You have only five lives to complete the game, adding tension and emphasizing careful play. 3. Minimalist aesthetic: The game uses a stark, two-color palette (typically red and black) that enhances the oppressive atmosphere. 4. Sound design: The audio is crafted to induce anxiety, with a pulsing soundtrack and unsettling sound effects that intensify as you explore. 5. Hive structure: The game world is structured like a hive, with five crystals to collect. Each crystal bestows new abilities on the enemies throughout the entire game world. 6. Short but intense: The game can be completed in about an hour, but its difficulty and tension make it a challenging experience. 7. Local co-op: A second player can join as a drone, adding a unique multiplayer dynamic to the normally solitary Metroidvania experience. 8. Permadeath elements: If you lose all your lives, you must start the game over from the beginning. Overwhelm subverts many traditional Metroidvania tropes, creating a tense, oppressive experience that stands out in the genre.