Games like Valley of Decay

DemonsAreCrazy is an action-packed multiplayer RPG blending MOBA and co-op gameplay where demons compete to become President Satan. Choose from 18 customizable characters, engage in PvP battles, quests, and boss hunts, and craft powerful gear to dominate Hell’s chaotic election. Enjoy intense gameplay with immersive graphics and dynamic multiplayer modes.

"Fallen Earth" is a post-apocalyptic MMORPG set in a ruined world, where you must survive as a clone with an unknown past. Explore the Grand Canyon's 1,000 square kilometers of harsh terrain, engage in classless advancement and non-linear gameplay. Participate in dynamic events, factional alliances, crafting, and PvP combat, with the freedom to play the character you want in a world of destruction and betrayal.

"8BitMMO is a free-to-play, retro-style 2D massively multiplayer role-playing game where players can build their own homes, towns, and dungeons in a 100% player-built world. Engage in Player vs Player combat, fight evil LawyerCats, or become a mayor and manage your own town. With ongoing development based on player ideas and anti-griefing systems in place, 8BitMMO offers a unique and interactive gaming experience."

Life forge is an ORPG designed to be what you make of it. The story is simple, you are found unconscious along a shore line by an elderly man who leads you to his home for shelter. There, the player soon realizes they have no memories, of course and the world in Life Forge is all new to them. From here, the players life is whatever they make it. A Life Forge, if you will. In the world of Life Fo…

Stein.world is a surveyable, massively multiplayer open world fantasy game that can be played in any modern internet browser. Players can craft equipment, battle enemies, and complete quests, while trading and grouping with others. The game features a wide range of customizable items and no strict class system, allowing for flexible character builds and play-styles.

"Wanderlust: Rebirth" is a 16-bit styled action RPG with up to 4 player co-op. Fight through hordes of monsters in various levels with different game modes. Engage in class-based character progression and intense boss battles, using a wide range of weapons and spells.

"Undawn is a free-to-play, action-packed open-world survival RPG, combining PvP and PvE modes for a thrilling post-apocalyptic experience. Brace for harsh environments, realistic survival mechanics, and customizable characters in this immersive adventure. However, be prepared for grinding and numerous bugs that may impact gameplay."

Survived By is an MMO bullet hell roguelite from Digital Extremes.

Aberoth is a fantasy massively multiplayer online role playing game with charming retro graphics and tons of freedom.

Unison League is a real-time, action-packed Role Playing Game with intense guild battles and mesmerizing attack scenes. Players can team up with friends to complete quests and unleash over-the-top special attacks. However, be prepared for lots of grinding and bug encounters that may hinder the gameplay experience.