Introduction

NeoGameLib is a prefab framework for MonoGame. It layers a Unity/Godot-style GameObject system, a collision bus, a render bus with world-space cameras, a screen-space UI system, input action maps, timers, storage helpers, and an asset cache on top of plain MonoGame. Everything is components attached to objects, and every system is a bus hanging off one NeoGame instance.

• Targets .NET 8 and .NET 9
• Built against MonoGame.Framework.DesktopGL 3.8.x
• License: AGPL-3.0-or-later
• All public types live under the NeoGameLib namespace tree (NeoGameLib.NeoGO, NeoGameLib.NeoRendering, NeoGameLib.NeoCollision, NeoGameLib.NeoUI, NeoGameLib.NeoInput, NeoGameLib.Common, NeoGameLib.NeoStorage)

Features

• GameObject model — worlds hold objects, objects hold components, components hold your logic. Load/unload worlds at runtime.
• Collision bus — AABB colliders with interface-based callbacks and world collision groups.
• Render bus — sprites, text, world-space cameras with zoom and layer culling, sprite animations, render features.
• Screen-space UI — canvases, panels, flexbox, buttons, anchors and sizing modes, resolution scaling.
• Input action maps — named actions over keyboard and mouse with edge-triggered pressed/released states.
• Timers, movement, storage — reusable countdowns, a platformer movement component, JSON/file stores, an asset cache.
• Letterboxed viewport — fixed-aspect viewport with window modes, independent of the window size.

The library is small and consistent: once you understand the GameObject world model and the per-frame order, every subsystem follows the same shape.