Holosseum (ホロシアム) is a 1992 fighting arcade game developed and published by Sega.

The name is a portmanteau of holography and colosseum, due to it being a fighting game created exclusively for Sega's hi-tech hologram theater cabinet, and is the second and last game created for it after Time Traveler.

It was one of Sega's earliest attempts at creating a competitive fighting game along with Dark Edge, after the success of Capcom's Street Fighter II.

The player has a character roster of four selectable fighters to choose from, each with their own fighting style and special techniques.

Like Data East's Karate Champ, the amount of space to move around in Holosseum is very small.