Ultima I
Ultima II
Ultima III
Ultima IV
Ultima V
Ultima VI
Ultima VII
Ultima VII - Part 2
Ultima VIII
Ultima IX
Ultima Underworld I
Ultima Underworld II
Worlds of Ultima I
Worlds of Ultima II
Runes of Virtue I
Runes of Virtue II
Ultima Online
Atari ST Version
Others: Amiga Apple II Atari 800
C64 FM Towns FM-7 IBM PC
MSX 2 NES PC-8801 PC-98
SMS X68000 X1  
Other releases on this system
Microprose Re-release  
Year of Release: 1987
Publisher: Origin Systems Inc.
Contents: Book of Mystic Wisdom, The History of Britannia, Cloth Map (16x16" / 40x40 cm), Metal Ankh, 2x 3.5" Disks, Player Reference Card
The Atari ST version of Ultima IV was released more than 2 years late but is pretty much identical to the other releases - content wise. The only real differences are the disks (obviously) and the reference card. The game itself however has been significantly improved for both 16 bit systems (Amiga and ST). It features more colorful graphics, the complete soundtrack of the original Apple & C64 releases and has mouse support.