Lua scripts which overlay the game in an emulator for an interactive visual of collision.Sonic Origins Plus is a compilation of the hedgehog’s earliest games, packing Sonic 1, 2, 3 & Knuckles and CD all under one roof. Special stages including the rotating mazes from Sonic 1.Ĭamera mechanics when following the Player.Īnimations system, and specific animation timings & rules. How the second Player will follow you throughout stages, and how they respawn when they fall offscreen. General special abilities such as spindashing, and also detailing how character specific moves work.Įlemental Shield abilities, powers, and moves. Ring dispersal mechanics and physics when lost. How they are constructed, function, and interact with the Player.īadnik and bosses behaviour, collision, and specific interaction with the Player. Mechanics and sizes for things like rings, pushable blocks, buttons, and springs.

The order that objects update each frame, and order of specific events like Player collision and movement. Nevertheless, it is important to note that this guide will still acknowledge the quirks, limitations, and workarounds that were necessary for the original game due to its utilisation of a low-level programming language. Moreover, individuals using this guide will be able to easily utilise specialised engines/IDEs such as GameMaker, Unity, Godot, Clickteam Fusion, or Love2D to implement the described game rules. As a result, these rules can be applied to modern programming languages such as Java, C, C++, Python, or a Lisp dialect when implementing the physics described in this guide. This guide will present these physics rules in an engine-agnostic manner, focusing on the tangible results of the game logic instead of delving into the minutiae of how the original 68k assembly code operated. Whether you're a curious newcomer, an experienced fan game developer, or a seasoned Sonic fan seeking a deeper understanding of the games, this guide aims to present the information in an accessible manner, providing clear and concise breakdowns of the underlying concepts.

The guide will shed light on exactly how every aspect, from navigating slopes and loops to interacting with Springs, contributes to the gameplay.

Here, the intricate details of how the game's physics function are thoroughly explored, providing in-depth explanations about the exact values and rules and precise speed values governing Sonic's movements, 360 slope physics, Badnik & object behaviour, all the way to the construction of the sloped terrain. Welcome to the Sonic Physics Guide, a comprehensive resource dedicated to describing the inner workings of the classic Genesis & Sega CD Sonic games, along with Sonic Mania.

Sonic 1 mania sprite sheet