SOR City NB12 for Bus Simulator 21 is a meticulously crafted modification that introduces the SOR City NB 12 bus model to the popular simulation game. This bus, produced by Czech company SOR Libchavy, features a fully low-floor design with four doors and is modeled after the version operating in Prague. The bus measures 12 meters in length and is designed to accommodate 36 seated passengers and 80 standing passengers, reflecting its real-world specifications. The modification showcases the bus's interior with two exclusive variants, enhancing the gaming experience for users.

The mod is built from scratch, ensuring a high level of detail and realism, and is not a reimport from previous versions. The creator, Kostič_CZ, has dedicated personal time to develop this mod, which is not affiliated with any studio or brand. The inclusion of custom interiors and the emphasis on community feedback during development highlight the commitment to quality in this utility. However, it is important to note that exports and usage in other games are strictly prohibited.