Start Here!

Sunday, February 20, 2011

Nintendo Computer TV Game (コンピュータ TV ゲーム, 1980)

In 1980 Nintendo created a home video game based on the Computer Othello arcade machine, which they had released two years earlier.

It was called Computer TV Game (コンピュータ TV ゲーム), and had model number CTG-HC10.

The manual of one of the rarest game machines around

The game can be played head-to-head by two people, or against the computer. The algorithm the machine used to play Othello against a human opponent was quite sophisticated, for its time.

The technology wasn’t really ready for this kind of commercial home release, but Nintendo went ahead anyway, believing there would be market for it. The company achieved the conversion by simply incorporating a complete arcade board, resulted in a big, heavy machine that required a fat power supply that weighed more than 2 kilograms alone. It was expensive too, retailing for ¥48,000, for a machine that only could play Othello. Three years later the Family Computer, able to play hundreds of different games - including Othello - could be had for less than a third of that price.

Unsurprisingly, the machine was produced, and sold, in limited quantities. They are rarely offered for sale these days and command high prices. After years of absence, one was on sale on eBay in 2009. It sold for US$2,000.

In February 2011 one was sold on Yahoo Japan Auction. According to the seller it was unused, and surely looked nice. The final bid was a steal for ¥242,000! That is almost US$3,000 in today's dollars the lucky winner had to part with in order to call it his.

242.000 yen? Are you sure? [2011 auction]

After an absence of three years on online auctions sites, another specimen was auctioned in January 2014. This one was also unused, but the price did not go as high this time. It fetched "only" ¥126,000. Still, a respectable sum of money.

That's quite cheap, at close to three times its original retail price [2014 auction]

Let's take a look at this rare and desirable machine; the most obscure of all Nintendo's video game releases.

The name Computer TV game is pretty generic, for a machine that can only play Othello. The image on the front does give a hint in that direction, as it shows an Othello game in progress. The top flaps of the box can be folded, so it can be carried more conveniently. No luxury, as it is big and heavy.

On the side we see the name of the item in katakana,  the model number, the kanji version of the Nintendo logo, and the suggested retail price of ¥48,000.

On the top of the box is printed what should be in it: the game machine, a power supply and an RF switch. Also shown are the instructions on how to fold the top flaps.

The machine is well protected by styrofoam. We have just taken off the top part, to reveal the treasures within. The carton on the right holds the power supply.

Here it finally is, in all its splendor. All in all an impressive looking machine.

A close-up of the power supply (CTGA-1255) reveals what a power hungry fellow this game is.

The orange and blue buttons on left and right side are for player 1 and 2. The small orange buttons move the cursor, the large orange button confirms a selection and the blue one allows a player to pass. The buttons in the middle are used to select game type and difficulty level.

With these buttons the game type is selected: option A and B are head-to-head games for two players, option C and D are games against the computer. Note how the options are read from right-to-left, in the traditional Japanese way. This indicates that this is a serious game, not a toy.

So, what can this machine actually do? Let's find out.

The rules of Othello are pretty straightforward. From a start position with 4 pieces in the middle of the play area (two for each player), the two players take turns placing one piece at a time. When pieces of the opponent become enclosed (horizontally, vertically, diagonally), they are swapped for pieces of the other player, thus increasing the number of pieces this player has on the board. When all places are filled, the player with the highest number of pieces on the board wins.

The manual provides some strategic advice, and indicates the good and bad spots on the board to place your piece. Obtain the corners is pivotal to success.

Do we want to play a game (ゲーム)? Sure!

Which one? Let's select "rank" (ランク) C , and see what happens. We will be playing against the computer.

We play using the plus sign, the computer uses the square. We take turns placing pluses and squares on the board, and soon the computer is ahead.

The computer remains very polite: "please decide" (ハンテイ ドーゾ), but by the looks of it, it has already beaten us.

When no moves are possible anymore,  the computer counts the squares and pluses to determine who has won. It was close, but we did lose. Not satisfied with a single win, the computer immediately begs us for another turn: "reset please" (リセット ドーゾ).

Advertisement in the Computer TV Game manual for other Nintendo consoles

In the back of the manual of the Computer TV Game, the four consoles in the Color TV Game series are advertised.  You could buy all four of them for the price of just the Computer TV Game, and still have around ¥5,000 to spare.

So, there you have it. There are cheaper ways to play Othello. But there is arguably no Nintendo item that is more valuable.

[2024 UPDATE] After a decade long draught, in which not a single Computer TV Game appeared on any auction site (at least, not to my knowledge), one just popped up in March 2024, and sold for a staggering ¥755,009!


  1. Hi Erik, thanks for an interesting article found via Google. Just wanted to come forward and say it was myself who won the auction on Yahoo Japan Auctions. It was worth every penny as I agree there really is no other Nintendo item as rare as this. I have not seen another in such good condition on Yahoo Auctions for 6 years. They really do not come along very often! The CTG-HC10 in question is going to a good home in the UK as part of a serious private Nintendo collection.
    Best wishes, retrogamer (Steve)

  2. Hi Steve,

    Congratulations with the addition to your Nintendo collection. If you're a serious collector, I am pretty sure you will enjoy this blog. I plan to cover tens of items the coming time. Would love to hear more about your collection as well.

    Cheers, Erik

  3. Hi Erik, let me know your email address or some other way of getting in touch with you and I will send u some pics when I get around to taking some.


  4. Great post! A very interesting product indeed!

  5. So, this is the most valuable Nintendo product ever...?
    Thank you Erik, for your EPIC blog.

  6. BTW, probably the most valuable Nintendo products are actually some Nintendo Tabletop games and arcades...?

  7. I want to make a ful size model of this, however, I dont know how big it is... can you please tell me the dimensions of it? Height, width, and Length? That would be very helpful!

    1. Hi John. The dimensions are 36 cm wide x 27 cm deep x 7 cm high. Good luck with the model. Can you please send a picture when it is done? I would appreciate that.

    2. Thanks so much! I will get to work on it!

  8. I am almost finished with it, I just need to put on the buttons, and spray paint it. Sorry about the hold-up, I want to port a rom of computer othello onto the model so it will actually play the game just like the real system. So it may be a few more weeks.

    1. I did not realize you were going for a *working* model! Looking forward to the result.

  9. Hi, my son is doing a Nintendo timeline and is struggling to find the release date of the Computer Tv game. He has found it came out in 1980 but looking for a more specific release date.
    Thanks in advance.

    1. I also do not know a more specific release date. Sorry for the late reply!

  10. Hi! Great info you gave us!
    Only one question: the lower switches and blue button in the middle, what they do?

    1. Thanks. The buttons and switches in the bottom middle are, from left to right: green button is reset, power switch (on/off), volume switch (soft/hard) and blue "judgement" button. The latter gives the score between the two players by calculating the squares and crosses, used when no player moves are possible anymore.

  11. I was wondering if you could take a picture of the PCB of the unit. It would be great to confirm if it is identical to the arcade machine.