Square Enix has released the trailer for I Am Setsuna. The two-minute video offers a look at a few segments of the story, but most importantly it shows throughout the game's battle system, which will be for Playstation 4 and PC.
The battles in I Am Setsuna are turn-based and inspired by Chrono Trigger. Characters have Techs, special abilities that they can employ, and can work with other allies to form a team.
Some of the skills used in the trailer are X-Strike, a Team Combo performed by two characters, and Ground Aerial Strike, Charge, Cross Cutter, Cyclone, and Demi Techs.
Source: Siliconera