What If...? » 9 issues

Issue #4

What If the Alien Costume Had Possessed Spider-Man?

October 1989

Issue #20

What if the Amazing Spider-Man had Not Married Mary Jane?

December 1990

Issue #31

What if Spider-Man Had Kept His Cosmic Powers

November 1, 1991

Issue #34

What if No One Was Watching the Watcher?

February 1992

Issue #42

What If Spider-Man had Kept his Six Arms

October 1992

Issue #44

What If Venom Had Possessed the Punisher?

December 1, 1992

Issue #75

What if Blink of Generation X had Not Died?

July 1995

Issue #114

Brave New World

November 1998

Issue #200

What if Norman Osborn won the Siege of Asgard?, What if the Watcher Killed Galactus?

February 2011