Giant Monster Games (Other Than Rampage or Godzilla) for home consoles.

[j_factor]

A game that really fits the 50s giant monster sci fi theme well is It Came From the Desert for the TurboCD. It's a mix of Them and Invasion of the Body Snatchers. Good stuff. It's really fun, except the little mini games you play get tedious after a while.

Yep, there was also a different game of the same title (though somewhat related) for Amiga. It's mostly giant ants.

[NerdXCrewWill]

EDIT: I always thought they were straight ports. That's interesting to know. Thanks!

[A Black Falcon]

King of the Monsters I and II, SNES, Genesis, Neo Geo

Ultraman, SNES

I don't know if this counts to you or not but several of the Power Rangers games may fit that category.

Genesis KOTM2 is actually a different game from the Neo-Geo/SNES title -- instead of being a beat 'em up/fighting game hybrid, the Genesis one is a pure fighting game, with no beat 'em up segments at all. Instead, you can play as the bad monsters as well as the good ones, so there are a lot of characters to choose from... on SNES on the other hand it's a port of the Neo-Geo game, and a quite good one too I would say. I like it better on SNES, but the Genesis version is worth checking out.

Oh, and for It Came from the Desert, there's also a never released, but complete, Genesis version out there that Cinemaware has released for free. It's a different game from the other versions I believe.