though on a serious note: any final fantasy game any neptunia game (main series, not spinoff) for memes and references skyrim (huge time sink) divinity original sin 1 & 2 mmorpgs: final fantasy 14 phantasy star online 2 for the lewds with decent story and/or gameplay: kamidori alchemy meister (or any eushully game) bunny black series
Morrowind Skyrim Oblivion Divinity 2 Dragon Age Origins (Don't play DA 2) Two Worlds 2 Castlevania Sci-fi : Mass Effect series Nier Automata Remember Me
Dragon age origins it's one of the best rpg I've ever played and since it's old (2009) it will be pretty cheap.
The first time I used alchemy meister I was shell shocked when the lewd stuff came up not because I wasn't aware it was that type of game, but because I was having so much fun I forgot it was in it. Also fallout new Vegas, elder scrolls oblivion. People adore elder scrolls morrowind but I can't get into the game due to its combat but feels right to add it.
TES IV and V - Oblivion and Skyrim Kingdoms of Amalur Reckoning Mount & Blade , if you like war type games Castlevania - Symphony of the Night/Castlevania: The Dracula X Chronicles , never gets old
Ni No Kuni: Wrath of the White Wanima. It is probably one of the most beautifully animted games I have ever played