The First 15 Minutes of Demon's Tier+ (Vita)

Copied from MobyGames:Thosgar, a hated king, attracted by the sorceress & demonic rituals, was consumed by his hatred & a fearsome urges, he then turned into a dark & diabolical being.Destroying almost all of humanity & flooding the world of monsters.All this was remembered as legend until peace returned eventually...A Thousand years later, a mysterious pit has appeared in the village after a huge earthquake where a dark & evil aura emanated from...From the union of RiddledCorpse and XenonValkyrie comes Demonstier, an RPG roguelike with elements of action, adventure, & arcade.Enter the dungeons of king Thosgar & destroy the demonic beings present there .

http://www.nicovideo.jp/watch/sm42467740