Friday 1 May
21 releases
- 3X3 Puzzle ArcadeAce Enterprise
- AeroGauge Nintendo 64Locomotive Corporation
- Ai to Yume no Kuni Sanrio Puroland: Chanto Dekirukana? Minna to Tanoshii Oyuugikai Sega PicoSega Enterprises, Ltd.
- All-Star Baseball '99 Game Boy
- Anchorhead Linux, Mac, PCMichael Gentry
- Astra Superstars ArcadeSUNSOFT
- Devilgotchi Handheld Electronic LCDBandai Namco Entertainment
- Extreme Snow Break PlayStation
- Forsaken PCProbe Entertainment
- Mickey Mouse: Magic Wands! Game BoyKemco
- Of Light and Darkness: The Prophecy PC
- Red Hawk ArcadeAFEGA
- Reel Fishing PlayStationVictor Interactive Software
- Selection I & II Game BoyKemco
- Super Famicom Wars Super FamicomIntelligent Systems
- Tactics Ogre: Let Us Cling Together PlayStationQuest
- Virtua Striker 2 Version '98 ArcadeSega AM2
- VR Sports Powerboat Racing PlayStationPromethean Interactive
- White Album PCLeaf
- World Cup 98 PlayStationEA Canada
- World League Soccer '98 PlayStationSilicon Dreams Studios
Saturday 2 May
3 releases
- Dragon Force II: Kamisarishi Daichi ni Sega SaturnChime
- GothicDM 2 PC
- Judge Dredd Pinball DOSPin-Ball Games
Sunday 3 May
1 release
- Vinceworld PCVince Collins
Tuesday 5 May
1 release
- Einhänder PlayStationSquare Product Development Division 5
Thursday 7 May
3 releases
- Rama PlayStationDinamix, Inc.
- Ganso Family Mahjong PlayStationNichibutsu
- World League Soccer '98 PlayStationSilicon Dreams Studios
Friday 8 May
4 releases
- Diablo MacBlizzard North
- Gran Turismo PlayStationPolyphony Digital
- Resident Evil 2 PlayStationCapcom Planning Room 2
- Soukaigi PlayStationYuke's
Saturday 9 May
1 release
- Ayakashi Ninden Kunoichiban Plus Sega SaturnZEROSYSTEM
Sunday 10 May
4 releases
- Sanatorium PCDreamForge Intertainment
- Tecmo World Cup '98 Arcade
- Tetris 2 + BomBliss LT PCBullet-Proof Software
- Yoshi's Story Nintendo 64Nintendo Entertainment Analysis & Development
Tuesday 12 May
2 releases
- Gran Turismo PlayStationPolyphony Digital
- Microsoft Golf 1998 Edition PCMicrosoft
Wednesday 13 May
2 releases
- Cute Fighter Arcade
- Xtreme Rally Hyper Neo Geo 64SNK
Thursday 14 May
3 releases
- Cowboy Bebop PlayStationBEC
- Guilty Gear PlayStationArc System Works
- XS Junior League Dodgeball PlayStation
Friday 15 May
5 releases
- Animal Breeder 2 Game BoyJ-Wing
- ClayFighter: Sculptor's Cut Nintendo 64Interplay Entertainment
- Riven: The Sequel to Myst Sega SaturnCyan Worlds
- Wario Land II Game BoyNintendo R&D1
- Worms Atari JaguarTeam17
Saturday 16 May
1 release
- Bomberman Wars PlayStation, Sega Saturn
Monday 18 May
2 releases
- Legal Crime PCByte Enchanters
- World Cup 98 Nintendo 64EA Canada
Tuesday 19 May
1 release
- Bio F.R.E.A.K.S. Nintendo 64, PlayStationSaffire
Wednesday 20 May
1 release
- Godzilla Online PCMythic Entertainment
Thursday 21 May
10 releases
- Baroque Sega SaturnSting
- Honoo no Ryourijin: Cooking Fighter Hao PlayStationNippon Ichi Software
- Idol Mahjong Final Romance 4 Sega SaturnYoshidayama-Workshop
- Meltylancer Re-inforce Sega SaturnTenky Co.
- Meltylancer Re-inforce: Special Edition Sega SaturnTenky Co.
- Pandemonium 2 PlayStationToys for Bob
- Shadows of the Tusk Sega Saturn
- Super Real Mahjong P7 Sega SaturnSETA
- Thunder Force V: Perfect System PlayStationTechnosoft
- Tomoyasu Hotei: Stolen Song PlayStation
Friday 22 May
6 releases
- Warcraft Adventures: Lord of the Clans Mac, PCBlizzard Entertainment
- Forsaken 64 Nintendo 64
- Spec Ops: Rangers Lead the Way PCZombie Studios
- Unreal Mac, PCEpic Games
- Vantage Master PCNihon Falcom
- VR Baseball 99 PlayStationVR Sports
Saturday 23 May
5 releases
- Heisei Shin Onigashima Super FamicomPax Softonica
- Heisei Shin Onigashima: Kouhen Super FamicomPax Softonica
- Heisei Shin Onigashima: Zenpen Super FamicomPax Softonica
- Kahen Soukou Gunbike PlayStationInti Creates
- Wrecking Crew '98 Super FamicomPax Softonica
Sunday 24 May
3 releases
- Castrol Honda Superbike World Champions PC
- Claw PCMonolith Productions
- Quake Nintendo 64id Software
Tuesday 26 May
3 releases
- Forsaken 64 Nintendo 64
- Ninja Master's: Haou Ninpou-ko ArcadeADK Corporation
- Street Fighter EX2 ArcadeArika
Thursday 28 May
11 releases
- Downhill Snow PlayStation
- Grandia: Digital Museum Sega SaturnGame Arts
- GT 24 Sega SaturnNatsume Inc.
- Kitchen Panic PlayStationPanther Software
- Lunar: Silver Star Story Complete PlayStationJapan Art Media
- Mujintou Monogatari R: Futari no Love Love Ai Land Sega Saturn
- ParanoiaScape PlayStationJorudan
- Radiant Silvergun ArcadeTreasure
- Shoujo Kakumei Utena: Itsuka Kakumei Sareru Monogatari Sega SaturnSega
- World Soccer Jikkyou Winning Eleven 3: Final Ver. PlayStationKonami Computer Entertainment Tokyo
- World Soccer Jikkyou Winning Eleven 3: World Cup France '98 PlayStationKonami Computer Entertainment Tokyo
Friday 29 May
6 releases
- Fox Junction PlayStationTrips
- Medarot Parts Collection 2 Game BoyNatsume Co., Ltd.
- Pachinko 365 Nichi Nintendo 64Vingt et un Systems
- Shining Force III: 2nd Scenario Sega SaturnCamelot Software Planning
- Super Speed Race 64 Nintendo 64Titus France
- Super Tempo Sega SaturnRed Company
Sunday 31 May
14 releases
- Beast Wars: Transformers Mac, PCSCE Cambridge Studio
- CyberStorm 2: Corporate Wars PCDynamix
- Fox Sports Golf '99 PCGremlin Interactive
- Fox Sports Soccer '99 PlayStation
- Icarus: Sanctuary of the Gods PCKRGsoft
- Jeremy McGrath Supercross 98 PlayStationProbe Entertainment
- Major League Baseball Featuring Ken Griffey Jr. Nintendo 64Angel Studios
- Norm Koger's: The Operational Art of War vol. 1 - 1939-1955 PCTalonSoft
- Quake II Mission Pack: The Reckoning PCXatrix Entertainment
- Redneck Rampage Rides Again DOSXatrix Entertainment
- Risk: The Game of Global Domination PlayStationNMS Software
- Star Wars: TIE Fighter PCTotally Games
- The X-Files Game PCHyperBole Studios
- Tribal Rage PC
Dates come from IGDB and move when publishers change them. Following counts are IGDB followers.