With over a half million units in combined sales worldwide, the SEGA 3D Classics digital series brings gamers back to the glory days of the beloved SEGA hardware systems. Trend-setting titles from the Sega Master system, Genesis/Mega Drive, and the arcades of the 80’s arrive on the Nintendo 3DS—remastered with full stereoscopic 3D. The best part? FOUR of the NINE classics are available on 3DS for the first time! Making its first appearance on retail shelves, this compilation package takes the series' fantastic offerings and packs it with additional exclusive content for unbeatable value!

• Experience anew the game that started it all: Sonic The Hedgehog!
• Rise from your grave with Altered Beast ! Supports multiplayer of Local Wireless.
• Fly through enemy bases and across solar landscapes in the space simulator marvel, Galaxy Force II !
• Deepen your appreciation for SEGA’s arcade prowess with the helicopter simulator, Thunder Blade .
• What do you get when you take a classic Sega Master System shoot 'em up and port it back to arcade? 3D Fantasy Zone II W !
• Reach the finish line with the visually stunning arcade racing game Power Drift !
• Test your competitive puzzle skills with the game that set off an arcade puzzle craze, Puyo Puyo 2 !
• Plus 2 more...

…Including Two 3D Master System Games

SEGA fans in the mid-80s were already playing in 3D thanks to the Master System's 3-D Glasses peripheral. Today, you can play Maze Walker (aka Maze Hunter ) and the original Master System version of Fantasy Zone II , no glasses required!

Not just ported—remade in 3D!

Developer M2 painstakingly recreated the originals by breaking down the original game code and doing a major renovation to take full advantage of the Nintendo 3DS system’s power.

Source: https://www.sega.com/games/sega-3d-classics-collection