Know more exactly as "Sid Meyer's Pirates!".
Released by [[Microprose]] in 1988.
The Amstrad CPC port was released in 1988.
It is notable for being one of the (too) rare 6128 specific game : only disk version and 128Ko Ram were supported.
In theory, 464 (+ disk drive) and 664 with Extra Ram upgrade should work. (maybe not ?)