Evolution of Thexder games

Thexder is a shoot 'em up game where you take on the role of a combat robot pilot that can transform from mech to jet at any time. Over 16 levels, you have to fight enemies using homing laser weapons. However, it will not work to shoot forever, since the weapon has a fixed amount of energy, with the full expenditure of which it will be expected to be restored. Also, your robot is equipped with a shield to protect against enemy shots.
Evolution of Thexder games :
1. Thexder 1985
2. Fire Hawk: Thexder - The Second Contact 1989
3. Thexder 1995
4. Thexder Neo 2009