Hentai Labyrinth

About
Hentai Labyrinth is the first game released by the Indie brand IMYUIC who's intention is to make cheaper games.

Gameplay
It's a DRPG, so you explore a dungeon, unlike most of them you don't get a large map to help you with this, instead your maps is small which allows you to only see 2 points ahead.

Battles are relatively simple affairs, fighting up to 3 monsters with your party at a time. You get a regular attack and some skills to choose from to use in battle. Skills take MP to use, this recovers by 1 per turn and the protag can slap the sister's ass so she gains another one, this is also used to switch transformation on the fly. The sister can transform into other forms to get different abilities, you can get more skills for a particular form by leveling it through combat use (up to Lv5?). It also employs a simple row system, having the sister character act as front and the rest as back row. This means that most enemies will focus on her first, some enemies like flying or ranged can bypass this as can spells.

Story
You find yourself lost in a strange world, and meet a girl bound in armor that...must be that older girl who used to live in your neighborhood? Sword in hand, join this girl on her journey of atonement and monster-bashing. Assist her, meet the strange inhabitants of the world, get caught up in everyone's affairs, and see where your journey takes you, and what mysteries might unfold before you.