Lewd Crest Abyss

Ero Ero Dungeon is a 2D erotic RPG where you play as Sherika, a female knight dispatched to conquer a mysterious dungeon in a separate dimension. The dungeon is built around a legendary treasure called the "Red Secret Stone" and is filled with lewd traps designed to drain adventurers' magical power by overwhelming them with pleasure, converting them into "mana batteries." The game features a simple "Directional Key Battle" system using only arrow keys—match vector power and press the correct direction to defeat monsters. Combat is quick and casual, but defeat leads to animated full sex scenes. The dungeon includes various trap types beyond monster encounters: futanari-themed keyholes, electrified mazes, aphrodisiac pools that cause progressive breast enlargement, and other extreme scenarios designed to humiliate and incapacitate the protagonist. Most erotic scenes include alternate variants featuring futanari and breast expansion content, allowing players to customize their experience. The game contains approximately 36 base CG images with additional scenes planned for future updates.