No Sega Games on Nintendo 64 — They Were Direct Competitors

No. Sega and Nintendo were direct competitors during the N64 era (1996–2001). The N64 used proprietary cartridges; Sega's platforms (Genesis, Saturn, Dreamcast) used entirely different hardware and media. No Sega-published or Sega-developed games were officially released on N64.

To play Sega classics, you need original hardware, modern collections (Sega Genesis Classics on Switch/PS4/Xbox/PC), or emulation.