I haven't played Port Royale but you may find some of these older games of interest to you, although they're more heavy on strategy and city building.

Anno 1503 and Anno 1602

The Patrician series, last entry is Patrician III

Europa 1400: The Guild

[QUOTE="grantcorp"]

Project-X (Amiga)
On gamefaqs: http://www.gamefaqs.com/computer/amiga/data/924276.html

Ballistix (Amiga)
Has a C64 gamespace: http://www.gamespot.com/c64/action/ballistix/index.html

Blood Money (Amiga)
Has a C64 gamespace: http://www.gamespot.com/c64/action/bloodmoney/index.html

Captain Fizz... (Amiga)
Has a C64 gamespace: http://www.gamespot.com/c64/action/captainfizzmeetstheb/index.html

Dracula68

No sweat, here are all relevant platforms for these games:

Ballistix (Amiga / Atari ST / PC)
Blood Money: (Amiga / Atari ST / PC)
Captain Fizz: (Amiga / Atari ST / DOS / ZX)

Project-X (Amiga)
On gamefaqs: http://www.gamefaqs.com/computer/amiga/data/924276.html

Ballistix (Amiga)
Has a C64 gamespace: http://www.gamespot.com/c64/action/ballistix/index.html

Blood Money (Amiga)
Has a C64 gamespace: http://www.gamespot.com/c64/action/bloodmoney/index.html

Captain Fizz... (Amiga)
Has a C64 gamespace: http://www.gamespot.com/c64/action/captainfizzmeetstheb/index.html

I would like to see a new Wing Commander game. Syndicate and BattleZone as well.