“Evergreen” Format Games

Here are several examples of games that I have been playing lately that have a “format” that gives them the potential for being single player evergreen games. That is to say, they have procedural strategic challenge generation, and seem to have a high rules/complexity ratio. (NOTE: This doesn’t mean that these games aren’t solved or easily solvable, it just means that provided they AREN’T solved or easily solvable, then they could be considered single player evergreen games).

I think these games are interesting for this reason, and I want to explore this space further with my own designs. Do you guys know of any more examples of this kind of thing for me to check out?