Gamma vs PCSX-Redux

Gamma is a PlayStation 1 emulator for iOS, iPadOS, and macOS. It supports touch and gamepad controls, save states, screenshots, game importing, and games that span multiple discs. For 3D games, the App Store listing describes enhanced resolution up to 8× and widescreen options. Supported disc images include BIN/CUE, CHD, PBP, ISO, and MDS; archive formats include 7zip, ZIP, RAR, and ECM. Cheat support and RetroAchievements are also listed. Optional Gamma Sync can connect Google Drive or Dropbox to store and retrieve selected emulator data. Games, BIOS files, memory cards, save states, and controller skins normally remain on the device unless a selected feature transmits them, such as Sync or a community submission. Gamma does not include commercial PlayStation games or proprietary PlayStation BIOS files, so users are responsible for using content they have a legal right to use. It is free to download and use, though the free version may show advertising through Appodeal and its partners. Gamma Pro – Remove Ads is listed for $4.99.

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.