I can think of a handful of games that, despite being games that I’ve enjoyed, never really became part of a “genre”. Do you have any like this, and if so, which?
Are they games that you’d like to see another entrant to the genre to? Would you recommend the original game as one to keep playing?
Maybe SimEarth.
This simulates a tile-based planet map. Animals grow and evolve, and things like atmospheric concentration and other aspects like surface albedo can be altered. More a toy than a game. Had a lot of fun playing with the levers.
1990 release – it’s still playable, though it’d feel pretty ancient and will not be very beautiful.
I haven’t played SimLife or Spore, and there might be some similarities there.
I’m not aware of anything else that’d be comparable.
EDIT: Liquid War. This is open-source and part of the GNU project. One has a map with some areas closed off and some open space that liquid can flow through. There are two or more “blobs” of liquid of different color; each is attempting to destroy the other. Your blob is attracted to your mouse cursor. “Moving into” a pixel of the other color eventually converts it to your own. If two liquids meet in a bottleneck, they tend to stalemate. One wins by getting liquid on multiple sides of the opponent’s liquid, so that one can move one’s own liquid from multiple directions into it. Maybe a bit closer to a tech demo than a full-on game. I wouldn’t call it mind-blowing, but it is free and as far as I know unique, and I had fun with it.
I almost forgot about SimEarth. For some reason I was allowed to play it in grade school computer lab. I wish they would remake it so I can recreate my sentient cephalopod uprising, except with graphics that aren’t complete ass.
I never played SimLife. But no, Spore is really not like SimEarth at all. As the other person said, Spore is disappointingly shallow on all levels.
Liquid War was awesome. One of my favorite things about it was that you could make your own maps using black and white bitmaps.