Conception - Ore no Kodomo o Unde Kure!! (Japan) ISO

At the root of Conception lies a dating sim / dungeon crawler.

Conception is extremely text heavy and will most likely not in playable in any form or fashion to those who aren't fluent in Japanese.

Just like its sequel the goal of the game is to mate with sereval of your companions to create star children. You use this star children in battle in the dungeons.

The similarities to the second game are heavy including reusing menus, enemies, sound effects and, even music. The real difference is part 1 uses a lot of anime cut scenes to show things off where as the second game uses its newer in game 3d engine. Also unlike the 2nd game you're required to manually select between the fields with your L & R buttons when in battle instead of it automatically doing so.

Conception 1 and 2 can pretty much be summed up as the same game and just different envisioning of the same thing. Play part 2 on the vita or the 3ds instead if you're not a native Japanese speaker.