The German studio Starbyte released Invest for the Commodore Amiga in 1990, placing it in a genre the German scene embraced far more enthusiastically than anyone else: the economic simulation. While the English-speaking market was driven by action games and adventures, German developers returned again and again to business and management titles, where the activity is buying, selling and reading tables rather than shooting anything. The game uses a top-down presentation with an interface built from menus and numbers, standard practice for the genre. The Amiga suited this kind of software well. A mouse was standard equipment, the 320x256 display carried enough colours to keep dense interfaces legible, and the machine's windowed operating system gave developers an obvious model for their own control schemes. Sound tended to be an afterthought in economic simulations; the real craft went into screen clarity and into how quickly a player could locate the number that mattered. Nineteen ninety also predates the charts, tutorials and advisory panels that later management games made standard, so much of the reasoning is left to you to reconstruct from raw figures. For anyone approaching it now that means a slow start and a genuine need to consult the manual or accept a period of trial and error. If you enjoy strategy without time pressure and like watching a decision surface later in the balance sheet, this is a sincere example of the form. Our entry records the publisher, year and platform alongside the available screenshots.