PPSSPP vs Unicorn Engine

PPSSPP is a PSP emulator for running games and other software made for the Sony PlayStation Portable. It is available on Android, iOS, Linux, macOS and Windows, with a free plan at free. Games can run at full HD resolution or higher, with texture upscaling and post-processing shaders. Players can use save states and a turbo button, customize touch controls, or connect a controller or keyboard. Save data transferred from a real PSP can continue a game. PPSSPP supports PSP ad hoc and infrastructure multiplayer, including ad hoc play through relay servers, and supports RetroAchievements after account sign-in. It runs PSP software only, not PS1 games or UMD Video discs; users must supply their own PSP game files. Compatibility reports are collected anonymously only when manually enabled. The open-source project is licensed under GPL 2.0 or later. Its official site provides documentation, FAQs, troubleshooting guides and community forums. PPSSPP Gold is available for Android, Windows, macOS and iOS, but not currently for Linux or Steam Deck.

Unicorn Engine is a free CPU-emulation framework for developers working across processor architectures and host systems. It focuses on CPU operations and can emulate raw binary code without needing an executable or full system image. Supported targets include ARM, ARM64, m68k, MIPS, PowerPC, RISC-V, S390x, SPARC, TriCore, and x86, including x86_64. The C implementation provides an architecture-neutral API, with fine-grained instrumentation and thread safety by design. The project also describes its use of a just-in-time compiler technique. Native support includes Windows, macOS, Linux, Android, BSD, and Solaris. The main code has bindings for languages including Python, Java, Go, Rust, Ruby, and Haskell; community bindings cover additional languages. Installation instructions cover source, repositories, Python packages, and precompiled binaries. The download page lists version 2.0.1, released November 1, 2022. Unicorn is distributed under the GPLv2 free software license and includes snapshots and restore, debugging tools, and automation access.