These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Cult Classic — The Settlers II, in particular its idiosyncratic infrastructure (segmented roads with each carrier relaying wares along their segment), attracted such a cult that it was remade in 3D on its tenth anniversary and also inspired the open-source game Widelands. Ironically, this iconic mechanism was likely influenced by early technical constraints, as it required far less pathfinding work for the computer compared to carriers walking around freely.
Game Breaker — Catapults in The Settlers II didn't break peace agreements, so you could just use them to bomb through most of the opposition base.
That One Level — Campaign level 6: The first level where there is no initial peace treaty with your more powerful, aggressive rivals.