Steam-lewd games? Hmm HunniePop is pretty good. Never played the sequel though.
If you want a break from the visual novel approach...
Midnight Castle Succubus, Eroico, & the Deep Space Waifu games.
Erioco is one I purchased for streaming. But the other two I'll have a look into. Funnily enough I wasn't even looking at visual novels, probably because thats a much longer format for videos, and yeah kinda over done to a point. :P
