Bishoujo games -- Colloquially known as galge. A microgenre in otaku media primarily focusing on cute female characters.
Eroge -- The primary term used for erotic Japanese video games.
Otome games -- Romance games made primarily for a female audience.
ADV -- Meaning adventure games. Think Ace Attorney or Famicom Detective Club.
SLG -- Simulation games, often with a focus on stat raising. Think Princess Maker or Tokimeki Memorial.
NTR -- Netorare. Cuck porn.
Sturgeon’s law -- “90% of everything is crap” [Effectively, that no genre is inherently worse than another. Anyone who has ever discoursed about turn-based combat has never heard of this law]