StarTropics NES - Chapter 4 - Frequency Code?



  • In the NES Game, StarTropics, in Chapter 4 - right after you escape the whale with Baboo, Nav-Com tells you to "Input Frequency!!":

    Nav-Com robot on Sub-C with Input Frequency message

    There does not seem to be any indication in the game for what the frequency should be.

    The only clues come from Baboo's recalling of Dr. J's last words, "Tell Mike to dip my letter in water..." - complete with a "Do you understand?" prompt. If you say you don't understand, he tells you that "Dr. J sent you a letter with a map of C-Island a few weeks ago!"

    Baboo and Mike on island with Dip letter in water message

    Then, if you enter the wrong frequency, Nav-Com tells you to "put water on Dr. J's letter in the instruction booklet." Is that referring to the printed instruction manual that originally came with the game? I do not have a copy of the instruction manual, so is there a way to figure out the frequency to enter from within the game?



  • Short Answer:

    Enter the number "747" as the frequency to continue with the game.

    There is no way to find this information within the game (see Full Answer below).


    Full Answer:

    This is a question that one of my kids brought to me while playing the games that I grew up with, and - while you can find the following information on the internet - I thought it was worthy of documenting within Arqade. Interestingly, the method for getting the frequency has changed over the years.

    To be able to continue with the game requires knowledge of a 3-digit code that originally was included as a hidden message on a piece of paper that came with StarTropics when purchased new and unopened...

    1990 Original NES Release

    From the original instruction manual: Pages 3-4 from original instructions

    Notice the footnote in the bottom right corner: "Please read the letter from Dr. Jones appended to this booklet."

    Here is an image of the paper that was appended to the back ( https://www.nintendo.co.jp/clv/manuals/en/pdf/CLV-P-NAAZE.pdf 😞

    Paper with letter to Mike and blank space

    The basic gist of the letter is that Uncle Steve is responding to Mike and inviting him to visit him on C-Island. I will emphasize the extra words in the footnote at the bottom: "Note: This letter is very important so please hold onto it till the end of the game." As a kid, I remember thinking it was really cool to have this extra paper that was somehow important to the game.

    Now that we know about this physical letter, Baboo's cryptic message makes more sense. When the paper was made wet with water, a hidden message would appear ( https://www.nintendo.co.jp/clv/manuals/en/pdf/CLV-P-NAAZE_en.pdf 😞

    Paper with hidden message visible

    This was a real world component to a video game! Definitely a fun experience as a kid. Nowadays, you will likely buy the game used without the original packaging and manual - and crucial letter to Mike from Uncle Steve!

    The content of the secret message in the letter contributed to the whole secret spy feel: Uncle Steve felt as though he was being watched and took a precaution to put a "tiny transmitter in [his] shoe" which was tuned to the frequency of 747 MHz.

    2008 Wii Virtual Console & 2016 Wii-U Virtual Console Releases

    When Nintendo released StarTropics for the Wii/Wii-U Virtual Console, they included an electronic version of the original letter in the Operations Guide, complete with a way to virtually "dip" the letter in water (by clicking on an image of a bucket of water) to reveal the necessary frequency:

    Image of virtual letter with virtual bucket

    https://www.youtube.com/watch?v=_g_u4KUlW9A (Thanks to @Showsni for the video link.)

    It is interesting to note that this virtual dipping only gave the minimum information to continue in the game (frequency 747 MHz), and did not include the hidden message from Uncle Steve revealing his (justified) paranoia and tiny transmitter.

    2016 NES Classic Edition Release

    The NES Classic Edition release included two digital manuals, an " https://www.nintendo.co.jp/clv/manuals/en/pdf/CLV-P-NAAZE_en.pdf " and a " https://www.nintendo.co.jp/clv/manuals/en/pdf/CLV-P-NAAZE.pdf ". The "Printed Manual" included the image of the blank letter. The "Electronic Manual" included a page to explain the letter and give the secret frequency:

    Electronic Manual page describing original letter insert

    This gave all the same information as the original printed paper, complete with the secret message communicating Uncle Steve's spy-level precautions.

    2019 Nintendo Switch Online Release

    When the game was released for the Nintendo Switch Online, they https://nintendoeverything.com/startropics-for-nintendo-switch-online-lacks-code-needed-to-progress/ https://techraptor.net/content/startropics-on-nintendo-switch-is-missing-a-vital-code-needed-to-progress https://nintendosoup.com/nso-version-of-startropics-missing-important-code-needed-to-progress/ https://www.eurogamer.net/articles/2019-03-18-nintendo-switch-version-of-startropics-impossible-to-complete-without-secret-code https://kotaku.com/startropics-on-switch-is-missing-the-clue-you-need-to-b-1833384044 https://www.nintendoenthusiast.com/nintendo-startropics-switch/ https://www.nintendolife.com/news/2019/03/nintendo_forgot_that_you_cant_complete_startropics_without_the_original_nes_manual (virtual, digital, or otherwise). https://thenextweb.com/gaming/2019/03/18/startropics-nintendo-switch-weirdness/

    Players who don't have any context to where that frequency was supposed to come from are forced to search online and find this answer:

    As we have learned from the above, the frequency that Nav-Com should tune to is 747 MHz. Entering this number will allow you to continue the game of StarTropics past Chapter 4.



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