That's a subjective question! However, some video games that are often considered among the worst by critics and players include:

1. E.T. the Extra-Terrestrial (1982) for the Atari 2600
2. Superman 64 (1999) for the Nintendo 64
3. Big Rigs: Over the Road Racing (2003) for PC
4. Bubsy 3D (1996) for the PlayStation
5. Shaq Fu (1994) for the Sega Genesis and Super Nintendo Entertainment System
6. Sonic the Hedgehog 2006 (2006) for the Xbox 360, PlayStation 3, and Wii
7. Duke Nukem Forever (2011) for PC, PlayStation 3, and Xbox 360
8. Haze (2008) for PC, PlayStation 3, and Xbox 360
9. Ride to Hell: Retribution (2013) for PC, PlayStation 3, and Xbox 360
10. Aliens: Colonial Marines (2013) for PC, PlayStation 3, and Xbox 360

Keep in mind that opinions on the worst video game ever vary, and what one person hates, another person might enjoy.