Akumajou (Akumajo) Dracula X: Gekka no Yasoukyoku is the Japanese version (only sold in Japan) of the Castlevania: Symphony of the Night (悪魔城ドラキュラX 月下の夜想曲) originally released on PlayStation (PSone, PSX) console. It was published as the direct sequel of Akumajou Dracula X: Rondo of Blood, for Sega Saturn platform.
Castlevania: Lords of Shadow 2 (CLOS2 for short, AKA: 悪魔城ドラキュラ ロード オブ シャドウ 2, Akumajō Dorakyura Rōdo obu Shadō 2, Devil's Castle Dracula: Lords of Shadow 2) is the sequel (3rd work) of Castlevania: Lords of Shadow series, also as the end work of this series. It was still developed by MercurySteam and published by KONAMI, released on Windows, PlayStation 3 and Xbox 360 in 2014.
Koumajou Densetsu (AKA: Legend of Scarlet Devil Castle, 紅魔城伝説) is a series of independent (fan-made) games inspired from Castlevania developed by the fan club Frontier Aja from Japan. It can be seen as the fusion of KONAMI's Castlevania series and Tōhō Project's (AKA: TouHou Project, とうほうプロジェク, 東方プロジェクト, Touhou Purojekuto, Project Shrine Maiden) series of doujin games.
Castlevania: Lords of Shadow – Mirror of Fate (AKA: キャッスルヴァニア ロード オブ シャドウ 宿命の魔鏡, Kyassuruvania Rōdo obu Shadō Shukumei no Makyō) is first direct sequel of Castlevania: Lords of Shadow, released by KONAMI in 2013 for Nintendo 3DS, Xbox 360 (on Xbox Live Arcade) and PlayStation 3 (on PlayStation Network). This ported HD remake and updated version was released in 2014 for Windows (on Steam platform).
Castlevania: Harmony of Despair (AKA: Akumajō Dracula: Harmony of Despair, 悪魔城ドラキュラ ハーモニー オブ ディスペアー, Devil's Castle Dracula: Harmony of Despair) is a brand new generation of Castlevania work with completely different gameplay - requires multiple players to work together. It was regarded as the supreme masterpiece of action cooperation game on Xbox Live Arcade, released by KONAMI for both Xbox 360 and PlayStation 3 consoles in 2011.