Moddio Game Engine 2 is a multiplayer-first game engine that offers a range of features. It includes a built-in server-authoritative netcode with snapshot interpolation and client-side reconciliation. Impressively, it can handle 50+ concurrent players or 300+ moving entities on a $5/month VM. The engine comes with a variety of tools such as a Box2D Physics Server, inventory and item system, built-in attributes like HP and Energy with regeneration rates, dialogue and shop features, unit control options, client-side predicted projectile and unit movement, unit AI with A* pathfinding, and mobile controls. To create a new game, Moddio provides a game editor that can be accessed on their website. The engine is open source and welcomes contributions from developers.
https://github.com/moddio/moddio2