Um Jammer Lammy (ウンジャマ・ラミー Un Jama Ramī) is a rhythm video game developed by NanaOn-Sha and published by Sony for the PlayStation video game console in 1999. It is a follow up to 1996's PaRappa the Rapper, once again featuring the collaboration of music producer and game designer Masaya Matsuura and artist Rodney Alan Greenblat. An arcade version co-developed by Namco, titled Um Jammer Lammy Now!!, was released in Japanese arcades in December 1999. The game was later re-released on PlayStation Network between 2008 and 2012.

The Unholy War is a PlayStation video game developed by Toys for Bob and published by Eidos Interactive. It is a fighting game in which characters fight in a 3D environment using mêlée and projectile attacks. The game features two modes: Mayhem Mode, in which the player fights other characters in one-on-one battles; and Strategy Mode, in which the player fights campaigns on various battlefields. The game came with a demo of Legacy of Kain: Soul Reaver.

Urban Chaos is the debut video game of English developer Mucky Foot Productions with its initial release in 1999 on Microsoft Windows. It was subsequently released on the PlayStation and Dreamcast. The game was published by Eidos Interactive. In May 2017 Mucky Foot's Mike Diskett released the source code of the game under the MIT license on GitHub.