Vastar

Vastar is a horizontally scrolling shooter released in arcades in 1983. It is the only game released by "Sesame Japan Corporation".
Plot.
In the year 2956 AD, a fighting robot named "Vastar" was developed by scientists in order to protect Earth from the "Galaxy Empire".
The game's is set in a post-apocalyptic Earth. In some points of the game, it can be seen ruins of the Statue of Liberty, Mount Rushmore and the Rapa Nui (famous Easter Island's statues).
Gameplay.
The player controls Vastar, a fighting flying robot that can shoot enemies with laser beams. Vastar is destroyed by enemy contact or strike but it is provided with a shield that must be activated to prevent attacks. When the shield's energy runs out, Vastar turns itself in an airship that still can shoot laser beams but it's defenseless against strikes. As the player reaches Vastar's base (as well if the player loses a life and restarts with another one), the shield's power is fully charged again and Vastar returns to its default form.