So there's this game I was recently recommended by a friend, Embric of Wulfhammer castle. It's a Indie RPG/Visual novel/Dating Sim, and is one of the most unique games I have ever played, and one of the best story line's i've seen (filled with absolutely hilarius comedy). Best part it's free (and packed with ALOT of content), and the latest version is out.

http://wulfhammer.org/

Warning: Has some naughty content (nothing to explicit some nudity here and there), though if you get the latest version, they give you the option to turn it off.

Tentacles?

After some quick research, a couple facts about it: It's made with RPG Maker, there's very little combat, it's ENTIRELY yuri content, it's made by an American, it's Ecchi at most.

I'm not sure if even ecchi is allowed here.

No tentacles (Though some of the romance options are pretty..."Unique")

It's not mainly Ecchi.