Kairosoft games! I'm counting them as one since there's a ton and they tend to have similarities. Kairosoft puts out a new game every four-six months or so, and almost without fail, they're cheap, charming, and fun to revisit. If you want fun management sims on the go, Kairosoft's your team!

a pixel art of an office with the website bandisoft.com visible

ALT: a pixel art of an office with the website bandisoft.com visible

MAJESTY! Majesty is a unique blend of RTS, management sim, and a touch of tower defense, and there has never been another game like it. Herding your heroes around with reward money, blowing your treasury on casting wizard spells, screaming when you hear your tax collector die AGAIN, it's good shit.