PPSSPP vs Redream

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.

Redream is a Dreamcast emulator for Android, Linux, macOS, and Windows. It lets players run Dreamcast games, with the homepage listing rendering at 1080p or 4K and play without controller setup or adding BIOS or flash files. The homepage says more than 95% of the Dreamcast library can be played from start to finish; the download page gives a figure above 96% and says that share can be played at no cost. Listed features include widescreen codes, automatic cover art, save states, and cheat support. The package is under 4 megabytes, and the homepage says it can produce a smooth 60 Hz on decade-old desktops and mobile phones. Redream is free to use on supported platforms. Premium is a one-time purchase that works across those platforms, with pay-what-you-want amounts of $6, $8, $10, or $20. It adds high-definition rendering, multiple save-state slots per game, and a custom Discord server role.