Hardcore Civ V:
- Units require supply lines from friendly territory, they run out of supplies quickly if on campaign for too long.
- Trade routes require actual connections, no more trading with somebody on the other side of the world through hostile territory from the moment you meet them
- Shit can actually go
wrong: lack of money can cause revolts, bombardment of cities can cause infrastructural damage, which in turn creates revolts, not being able to supply a trading partner the goods/cash you promised in an exchange will cause them to declare war or severely punish you with embargoes, being at war constantly will create unhappiness... with preferable no easy way to fix these problems, so that actual spirals of disaster could befall any empire.
- When too much unhappiness piles up or things go too wrong, civil war ensues and the country splits in two.
- Cities ranged attack reduced to 1 range or completely removed.
- Ridiculous upgrade combos for units removed, units lose experience over time when they don't fight, units lose experience when getting hurt, healing units costs money, healing cities costs money.
- Social policies will have both benefits and drawbacks, not just benefits.
- Religions can't be completely controlled, a strong religion severely limits the choices an empire can make without pissing off it's people.
Casual anything:
- Cutscenes, then click the buttons you're told to click, then more cutscenes, the End.
Not trying to bash casual games or anything