Nintendo Switch 2 owners running older system software are reporting that SmileBASIC 4 and Civilization VII can no longer launch without a firmware update. The restriction reportedly affects consoles running version 23.0.1, with an update warning requiring users to install version 23.5.0 before accessing the affected games.
The reports emerged on November 12 through the Switch 2 homebrew community, including an announcement shared on the r/switch2hacks subreddit from its Discord server. Multiple users have described encountering a mandatory update restriction known as “Supernag,” which appears to prevent the two titles from launching even when they are already installed.
Unlike a standard Nintendo Switch system update reminder, which users have sometimes been able to dismiss through maintenance mode, the reported Supernag restriction cannot be cleared using that method. Community members say the affected games remain inaccessible until the console’s firmware is updated.
The development follows the release of Switch 2 firmware 23.5.0, which reportedly patched the console's software-based jailbreak. Nintendo officially released the update on November 10, introducing accessibility improvements and preparations for an upcoming Nintendo eShop gifting feature alongside general system fixes.
The update’s security implications were subsequently identified by the homebrew community. Dataminer OatmealDome explained that version 23.5.0 patches the operating-system vulnerability used by the ns2jb jailbreak, preventing exploits in certain games from accessing functionality outside their restricted environments.
SmileBASIC 4 and Civilization VII had served as entry points for software-based exploits on the console. On firmware 23.0.1, these vulnerabilities could be combined with an operating-system exploit to enable activities such as running homebrew software, modifying games and extracting game data.
Although firmware 23.5.0 reportedly prevents that broader system access, the vulnerabilities within the individual games have not necessarily been eliminated. Instead, their capabilities are restricted to what the games’ own environments permit.
The newly reported Supernag mechanism represents a separate restriction. Rather than relying exclusively on the updated firmware to close the operating-system vulnerability, affected consoles running older software are reportedly being prevented from opening the games that provide the jailbreak’s entry points.
Community members have suggested keeping consoles disconnected from Nintendo’s servers to avoid receiving the restriction. However, these recommendations are based on user observations rather than verified Nintendo documentation. It remains unclear precisely how the restriction is delivered, whether it persists after a console has received it, or how broadly it affects systems running firmware 23.0.1.
For legitimate players who have not modified their consoles, the reports raise a separate concern: access to the affected games may now depend on installing a newer system update. The reported behavior does not establish that every Switch 2 running older firmware is affected, nor that other games face identical restrictions.
Nintendo has not publicly confirmed the reported Supernag enforcement mechanism or explained whether blocking these specific titles is an intentional anti-jailbreak measure. Its official firmware notes also do not identify the jailbreak-related security changes described by the homebrew community.
For now, the game-launch restrictions remain community-reported rather than officially documented. Their significance is the apparent addition of a software-launch requirement targeting known jailbreak entry points, even on consoles that have not installed the firmware update that patches the underlying operating-system exploit.
