The last trailer for Gundam Memories (see here) offered looks at the game's two modes of play, Situation Mode and Mission Mode. Namco Bandai has followed up with some pure gameplay clips, which you can see assembled together here.
We previously detailed the game's MS Shift system, which lets you switch off between three Mobile Suits as you fight. The Mobile Suits come in three forms: Speed Type, Close Range Type and Projectile Type.
The above trailer shows the game's "Special Trigger" system. Special Triggers are special attacks. To perform them, you'll need to have your SP Gauge, shown at the bottom left of the screen, built up, something that you do by attacking enemies or getting attacked.