AltStore PAL, one of the first alternative app store available for iPhones in the EU after last years major DMA changes, has ...

Right from the off, although being primarily developed for the NES, Chew Chew Mimic was touted for a Dreamcast release.

A homebrew SDK/pseudo-operating system for the Sega Dreamcast. This repository is a mirror of the official SourceForge repository for KOS.

Note - Repacks are compressed versions of games that exchange smaller downloads for longer installation times. Good if you have low bandwidth or data limits.