DuckStation vs Redream

DuckStation is a free emulator for Sony PlayStation games, available for Android, Linux, macOS and Windows. Its hardware renderer supports D3D11, D3D12, OpenGL, Vulkan and Metal, with upscaling, texture filtering and 24-bit color among the graphics options. Enhancements include PGXP geometry precision, texture replacement, adaptive downsampling and post-processing shader chains. Play options include save states, rewind, runahead, CPU overclocking and multi-disc support, along with memory-card editing and save importing. DuckStation supports RetroAchievements and Discord Rich Presence. It accepts digital and analog controllers, rumble, and up to eight devices through multitap; GunCon and Justifier lightguns can be simulated with a mouse. Supported formats include bin/cue, MAME CHD, single-track ECM, MDS/MDF, CCD and unencrypted PBP. A PS1 or PS2 BIOS image is required but not supplied, and games are not provided. The maker says users should dump a BIOS from their own console. Desktop requirements include Windows 10/11 and macOS 13.3 or newer.

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.