Twisted Metal 4 is a vehicular combat video game developed by 989 Studios and published by Sony Computer Entertainment for the PlayStation. The game was released in North America on October 31, 1999 and was re-released for the Sony Greatest Hits line-up in 2000. Like the previous installment, it wasn't released in the PAL regions.Twisted Metal 4 is the fourth installment in the Twisted Metal series and the second and last installment to be developed by 989 Studios. The game's plot centers on Sweet Tooth, the long-time mascot of the titular Twisted Metal competition, overthrowing Calypso, the mysterious organizer of the competition, in a coup d'état. He then takes over the mantle of granting the winner of the competition a single wish, regardless of price, size or even reality.Twisted Metal 4 received mixed to positive reviews from critics, who considered it to be an improvement over the previous Twisted Metal III, particularly in terms of level design.

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.

Warhammer: Shadow of the Horned Rat is a real-time tactics computer game published by Games Workshop (in conjunction with Mindscape) in 1995 and republished by GOG Ltd in 2015. It features medieval warfare and fantasy battles between military units at the squad and squadron level.

X-Men: Children of the Atom (Japanese: エックス・メン チルドレン オブ ジ アトム Hepburn: Ekkusu Men Chirudoren obu ji Atomu) is an arcade game that was produced by Capcom and released on the CP System IIarcade hardware in 1994.Based on the X-Men comic book, it is the first fighting game produced by Capcom using characters under license from Marvel Comics. Released around the time of the mid-1990s X-Men animated series, the game features voice actors from the series reprising their roles. The game's plot is based on the "Fatal Attractions" story from the comics - players control one of the X-Men or their enemies in their fight against the villain Magneto. They face each of the other characters in the game in best of three one-on-one fighting matches, before battling Juggernaut and then Magneto himself.The gameplay has much in common with Capcom's previous fighting games, Super Street Fighter II Turbo and Darkstalkers. Children of the Atom adds a combo system that features long combos that can even be performed in mid-air. Also featured in the game are various tactical maneuvers, including the ability for characters to roll. Children of the Atom also introduced multi-tiered fighting environments in which the ground would crumble and characters would fall into lower parts of the level. These concepts and the fast pace of the game would provide the basis for Capcom's Marvel vs. Capcom series, which started with the game's successor X-Men vs. Street Fighter.Ports of the game were released for the Sega Saturn, PlayStation and personal computers. Of these, the PlayStation version was not as well received as the other versions, suffering from slowdown and missing frames of animation.