[4] He was part of the team that participated at the 1994 FIFA World Cup in the United States, scoring against Bulgaria and Italy;[5][6] also in that year, he helped the Super Eagles win the 1994 African Cup of Nations in Tunisia, and was voted African Footballer of the Year.

Amunike played all of Nigeria's games at the 1996 Summer Olympics in Atlanta, scoring the winning goal in the final as the national team won the gold medal.

After retiring at the end of 2004, Amunike moved to Cantabria in 2006, where he lived with his Spanish wife, Fatima, and took coaching courses.

[14] He managed to qualify for the 2019 Africa Cup of Nations, but he resigned from training the team after losing all three games.

[17] Amunike was appointed the manager of Egyptian Premier League club, Misr Lei Makkasa in February 2021.