"When Worlds Collide" is a song by the band Powerman 5000 from their album Tonight the Stars Revolt!.

It is one of the band's most well-known songs and has been used in the video games Tony Hawk's Pro Skater 2, WWE Smackdown!

In 2016, the band accused Square Enix of stealing the song for use in their popular MMO Final Fantasy XIV.

It was initially exclusively available on the CD version of their album The Noble Rot.

The song begins and concludes with heavier segments with screamed vocals, while its middle section is more atmospheric and melodic.