The Oath is a science fiction action game developed and published by Guido Henkel’s company Attic Entertainment Software in 1991 for the Amiga.
In this side-scrolling shooter, you control a lone female character who must prove herself to join an exclusive mercenary group. Traveling in a ship, she must defeat a series of aliens to show her skills. The ship itself is not particularly strong and can be quickly felled by enemies if they manage to hit you. The ship can also be damaged by crashing into the terrain. Many power-ups can be collected to give you extra lives, upgrade the ship’s weapons, boost your speed, and much more.
This game is fast-paced and requires a good eye and a steady hand. There is also a rather comical purple alien; you’ll know which one I mean when you see it, but I doubt it was intentional. Though the game had an apathetic reception when it was released, it is still worth checking out.