Sega’s giving its classic games library, from the Master System to the Dreamcast, a new home. Sega Forever is a mobile service for iOS and Android that makes “nearly every Sega game” available for free.

The ad-supported program’s available now, making several beloved Sega titles available to download. The first round’s got a diverse lineup of Mega Drive and Genesis games: Sonic the Hedgehog, Altered Beast, Phantasy Star 2, Kid Chameleon and Comix Zone make up the inaugural set.

All of the Sega Forever games, which are a mix of ports and emulations of the original titles have offline play, controller support, leaderboards and cloud saves. The big caveat is that every Sega Forever title has ads — such is the nature of free-to-play games, after all.

To get around the ads, players can spend $1.99 to get a purer experience. (Sonic the Hedgehog is still showing as a $2.99 purchase, however, since it’s the same version that’s been available on the App Store and Google Play for several years.) All Sega Forever games will be available at this price, the publisher said, and that includes those coming to the program in the future.

Sega plans to release more titles at a biweekly cadence. We’ve got our fingers crossed for Sega Forever’s Dreamcast games making it onto mobile sooner than later.