https://www.youtube.com/watch?v=lg8fVtKyYxY
TL;DW
"Calculations are decisions based solely on reason, with a clear correct answer." That'd be the decision to chose armour instead of cold resistance.
"Choice is overcoming internal conflict. Without conflict, there is no choice, only decisions." This actually is a good example for the "only turn left" gun, as there's a conflict between maneuverability vs firepower, which are rather incomparable.
Eve Online has emergent gameplay but most of that is space politics and metagaming - almost despite the game itself rather than because of it.
Heck, vanilla minecraft has incredibly complex outcomes from basic rules - vis a vis redstone and automation and so on.
I've played hella grindy Korean MMOs, they were just a case of spend x time get y thing. No real challenge, just a willingness to keep trying until complete. I'd strongly suggest highly complex systems restrict player innovation and emergence, in a way simpler rulesets do not.
One ethos of my game is going to to be "work smarter, not harder." The kind of player who feels entitled to succeed just because they've spent enough time mindlessly grinding resources, so feels entitled to have awesome stuff dropped -- I hope those people spend their time elsewhere.
The player will be able to find very pointed capabilities that come with big disadvantages. The point will be to improvise around those weaknesses while exploiting contextual advantages. Others may choose to exploit in-game scripting and manufacturing capabilities to automate the search for certain technology combinations, but this will entail maintaining installations and the combat force to defend them.
With chess, on the other hand, the choice of 1. d4 vs 1. e4 is a huge one with TONS of implications, none of which are immediately obvious at a glance, but which are so rich and diverse that you have players literally identifying themselves as "d4 players" or "e4 players".
I hate to keep leaning on chess examples but they're the easiest since almost everybody knows about chess. I'd have slipped in a Battle Line example but almost nobody knows about that!