Join our Discord to chat with fellow friendly gamers and our knowledgeable contributors!

Not an American user?


Taking on the role of special agent Robert "Rip" Steel, it is up to you to destroy the evil Yellow Shadow's network of undersea mining bases. At the same time, you must protect your own bases from attack. You are in command of a small but powerful submarine, and must work quickly and strategically, if you are to succeed.


Project Neptune Atari ST Lining someone up
Project Neptune DOS Piloting your submarine, the HMS Remora
Project Neptune Commodore 64 In game play.
Project Neptune DOS Using the PDP to attack enemy subs

Promo Images

There are no promo images for this game

Alternate Titles

  • "המשימה נפטון" -- Hebrew spelling
  • "Operation Neptune" -- European release
  • "Bob Morane: Ocean" -- 1988 French release

Part of the Following Groups

User Reviews

There are no reviews for this game.

Critic Reviews

Atari ST User Atari ST May, 1989 9 out of 10 90
ASM (Aktueller Software Markt) Atari ST Mar, 1989 9.4 out of 12 78
Amiga Action Amiga Jan, 1991 70 out of 100 70
ACE (Advanced Computer Entertainment) Atari ST May, 1989 696 out of 1000 70 Amiga Jan 06, 2012 14 out of 20 70
The One Atari ST Apr, 1989 69 out of 100 69
Power Play Atari ST Apr, 1989 61 out of 100 61
Computer and Video Games (CVG) Atari ST Mar, 1991 56 out of 100 56
The Games Machine (UK) Atari ST Jun, 1989 55 out of 100 55
The Games Machine (UK) Amiga Jun, 1989 53 out of 100 53


There are currently no topics for this game.


Infogrames released a much more basic and limited version of this game, in France, in 1988, entitled "Bob Morane: Ocean". I'm not sure if there was a PC version or not.

The European version of Project Neptune is called Operation Neptune. One difference in the European release is that the player character is called Bob Morane (the same as in the earlier version of the game). In the US release, the player character is called Rip Steel.

The game documentation comes in a "Top Secret" folder, as a series of memorandums, reports and other documents.
Contributed to by Quapil (4852), xroox (3966), Dietmar Uschkoreit (6024) and Martin Smith (67624)