I noticed this weekend that there are two different "screw-versions" of the old NES games. As we can read on Nintendo Age, most of games have both version with 5 and 3 screws.

Here is a great example :

two NES cartridges, first with 3 screws, second with 5 screws

Do the games are 100% identical in-game? For some titles, there is a huge price difference between the 3 screws version and the 5 screws one and I want to be sure. Is the only factor the rarity of each version? Or there are in-game differences between those versions ? What is the reason there are 3 and 5 screws NES games?

  • This is a classic, "Why did they design it that way?" quesiton, and off-topic.
    – Frank
    Commented Jun 19, 2016 at 20:12
  • I would guess different factories using different manufacturing techniques/machines.
    – Exa
    Commented Jun 19, 2016 at 20:13
  • @Frank & Exa : This is exactly what I'm looking for. Is it really and ONLY a design issue? For some titles, there is a huge price difference between the 3 screws version and the 5 screws one and I want to be sure. Is the only factor the rarity of each version ? Or there are in-game differences between those versions ? My apologize, it was not clear in the initial question, but I will edit it. =)
    – Galabyca
    Commented Jun 19, 2016 at 20:32
  • That would probably depend on the game itself. I don't think we can answer this for every game that has a five screw and three screw versions. If it even matters.
    – Frank
    Commented Jun 19, 2016 at 20:40
  • 1
    it kind of does matter.. any "why did the dev do this" question is immediately off topic. Asking if soely if there are version differences is not, but at the same time, you have not specified a game. Asking about all games that possibley exist is way to broad for arqade.
    – user106385
    Commented Jun 20, 2016 at 0:53

4 Answers 4


It probably happened to save money on the top screws. Looking around a bit, I've found the following text regarding the cartridge variations:

Cartridges were originally released with five screws, one in each corner and one in the center. Later, the molds were changed so the back of the case held two male clips which hooked snuggly into the front’s “slot-B” holes. This eliminated the need for the upper corner screws and was, again, probably introduced as a cost-saving alternative.

I don't think you'll be able to find any better explanation, because in the end it's really just that: Another "hardware revision". The price difference is most likely related to the age and rarity, considering the variation with 5 screws is older and got abandoned.

As for the actual cartridge contents, it's impossible to say: This really depends on the actual game and despite popular belief, even classic console games were often released with one or two revisions, sometimes with bugs fixed or minor things (like some graphics) getting changed.

  • So, just to be sure, every games are the same (in-game) regardless of their screws version?
    – Galabyca
    Commented Jun 19, 2016 at 20:42
  • 6
    @Galabyca Impossible to tell. For one game 5 and 3 screw revisions might be identical. For other games there might be multiple versions even with the same number of screws. Basic gameplay should always be the same, it's just possible there are glitches or bugs being fixed. Also think about regional releases (e.g. there's a version of Kirby's Adventure with German text).
    – Mario
    Commented Jun 19, 2016 at 20:44

The problem is there's no way of being sure when the program was actually updated, before, during, or after the change in case/screw design. But yes, some are different.

For instance, I have a 5 screw Zelda and it lacks the "press reset" warnings present in most battery backed up games. I've seen other Zelda carts that do have the warnings (in game, I mean, not just printed on the cart labels). When did the change happen? Beats me, but most 3 screws seem to have it, and 5 screws not.


Although not related to 3-screw vs. 5-screw games, there is a way to see if there is a different rom on a game between two copies. According to this answer, all you have to do is check the revision number that is stamped on the caution label on the back of the cart. Each cart is stamped with 2 digits that represent an assembly line where the cart was assembled. IF nothing follows the numbers, then this is the first version of the game rom. If there is an "A", then it is the second version of the rom released to production, if there is a "B", it's the third, and so on.

Regarding 5 screws, yes this was a cost savings modification. By eliminating 2 screws, Nintendo eliminated the future-need to buy literally millions of screws. Also, this would have saved time on assembly and would have allowed for more cartridges to be assembled per day. This would have meant fewer facilities and assembly lines would be needed to crank out just as many carts.

  • Interestingly, the picture posted by OP shows a similar difference on the label: The one with three screws shows includes the text "REV-A" which is missing on the five screw cart.
    – LHM
    Commented Sep 22, 2022 at 14:57

In a lot of cases I've found so far, there are actual ROM differences between the 5-Screw and the 3-Screw cartridges. In some cases, there are even differences between some 5-Screw and other 5-Screw cartridges (e.g. Popeye - NES-PP-0 vs. NES-PP-1), and between some 3-Screw and 3-Screw cartridges (e.g. Dragon Warrior - NES-DQ-0 and NES-DQ-1), so yes, SOMETHING changed between them, even if's as minor as the difference between "Thy hits have been reduced by" (for the "Trademark To Nintendo" start screen message) and "Thy hit points have been reduced by" (on the Trademark Of Nintendo" start screen message) on the Dragon Warrior ROMs.

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