Sidney K. Meier was born in Sarnia, Ontario, Canada. Even from a young age, he displayed a strong interest in technology and problem-solving, setting the foundation for his future career in computer programming and game design. His childhood hobbies involved tinkering with electronics and a keen fascination with history, elements that would later become hallmarks of his game design philosophy.

Meier honed his programming skills by working on mainframe computers, a common practice in that era. This hands-on experience provided him with a solid understanding of computer architecture and software development, which proved invaluable when he transitioned to developing games for personal computers. This period was crucial in establishing his technical proficiency and laying the groundwork for his future game development ventures.