Re: [2990] TS Quest
There's a section in the menu for costumes, although none are available in the trial. Additionally, the 2990 blog now features some preview art for one of the outfits available in the final version.
The trial itself has roughly 3 or 4 H-scenes for the two main characters, there's a tentacle scene near the start with both, one scene that's mutually exclusive based on which character you pick, a couple scenes at the inn and a scene you can activate by returning to the first town once you have a bit of lewdness stat on both girls. Progression past that point on the lewdness train cuts off due to trial limitations though.
Personally I'm excited. I wish more of the sex scenes from the previous games were canonical, but... they bring the sex out early enough that I think I'm ok with it. What I was afraid of was that it would be mostly the main characters trying not to have sex with anything for 80% of the game which doesn't look like the case.