SEGA published two new games which will be included in the 2016 December 22 released SEGA 3D Reprint Archives 3 FINAL STAGE 3DS game.
The 1987 released Alien Syndrome and 1990 released Columns.

The Alien Syndrome is an action shooter game where two players can play together in local and playing in co-op mode still with the classic 1987 released design.
The Columns is a classic puzzle game but no, not the new action like, it is like the original tetris or the first generation Puyo.

SEGA 3D Reprint Archives 3 FINAL STAGE going to be the last, retro SEGA game collection which release on 3DS with 9 classic SEGA games.