-WikipediaThe technical definition of a dating simulation game, known as a romantic simulation game (恋愛シミュレーションゲーム ren'ai shimyurēshon gēmu?) in Japan, can involve several technical elements such as a time limit, several statistics such as looks and charm which can be boosted through exercise, or an "attraction meter" which can increase or decrease depending on one's decisions.
I've never actually played or know of any dating sims, so I thought I'd ask if you guys did.