Sega is paying homage to its classic library of games, but the format may not be ideal. The new "Sega Forever" collection is a line-up of free-to-play games from the heyday of Sega's console dominance. The catch? It's only available on mobile devices, and ad-supported.

The first five Sega Forever games will hit the App Store and Google Play tomorrow. Those include Sonic the Hedgehog, Phantasy Star II, Comix Zone, Kid Chameleon, and Altered Beast. The iOS versions include iMessage sticker packs. If you'd rather pay for an ad-free version, you can shell out $1.99 per game. New games will be added each month with Sega titles from all console eras.

Mobile ports of classic games have been hit-or-miss, as in the case of the messy Mega Man games that hit mobile earlier this year. Even if the emulation works perfectly, though, virtual controls and third-party controllers aren't ideal. As a way to try out some classics it will probably work well enough, though, and at the low, low cost of zero dollars it doesnt hurt to indulge in a little nostalgia.