PCSX-Redux vs ScePSX

PCSX-Redux is a free collection of tools, research, hardware design, and libraries for PlayStation 1 development and reverse engineering, centered on a fork of the PCSX emulator. The project aims to replace the plugin system with a monolithic codebase using OpenGL3+ and ImGui. Debugging features include VRAM, MIPS, and SPU debuggers, save states, and a GDB server for controlling program execution from a compatible IDE. Users can also work with a Lua console and editor or connect to Ghidra 10.3 or newer for MIPS debugging and reverse engineering. Graphics options include software and OpenGL GPUs, filtering, true-colour rendering, MSAA, and wireframe or vertex polygon views. It supports Xbox controllers, digital and analog controller emulation, and PlayStation Mouse emulation. OpenBIOS provides a MIPS R3000A BIOS implementation that can boot games without a retail BIOS, although the listed system requirement says a BIOS is required. Downloads are listed for Windows Intel 64-bit, Linux Intel 64-bit AppImage, and macOS Arm. The project describes the codebase as usable but still needing cleanup before a first stable release, with experimental components.

ScePSX is a free, MIT-licensed PlayStation 1 emulator written in C#. It runs on Windows, Linux, macOS, and Android; Android requires version 5.0 or later, with 9.0 or later recommended. Users can save and load progress, manage multiple save files, use cheats, edit and search memory, and play online multiplayer. Supported game image formats include .bin/.cue, .img/.cue, .iso, and .chd. The emulator supports D2D, D3D, OpenGL, and Vulkan renderers, which can be switched dynamically. Hardware backends support output up to 4K, while the software backend offers xBR and JINC upscaling. PGXP geometry enhancement works on software and hardware backends and can be adjusted without restarting; ReShade effects work on D3D, OpenGL, and Vulkan. Controllers are described as plug-and-play, and keyboard bindings can be customized. ScePSX does not include BIOS files, so users must provide one. Optional GameDB and ControllerDB downloads are listed, and the project accepts bug reports, suggestions, and contributions through GitHub.