Dragon Knight 4 (ドラゴンナイト４) is an erotic role-playing video game developed by ELF Corporation and released only in Japan for several platforms between 1994 and 1997. In 1994, the game first became available for PC MS-DOS, NEC PC-9801 and X68000, with a censored version ported to the Super Nintendo Entertainment System in 1996 and later to the PC-FX, PlayStation and Sega Saturn in 1997. It was also adapted into illustrated novels and an anime miniseries.

Dragon Knight 4 is a continuation of the Dragon Knight series, and a sequel to Knights of Xentar. Dragon Knight 4 has a new protagonist, Kakeru, the son of Takeru from the previous games.

The game features a turn-based battle system, with the player in control of up to eight additional characters. Allies and enemies are both separated into statistically distinct classes: swordsmen, archers and sorcerers, with certain armour and weaponry being appropriate to each.

The central character of Dragon Knight 4 is Kakeru (カケル) (voiced by Megumi Ogata), the son of Yamato Takeru, the protagonist of the earlier games in the series, and the sorceress Luna. At the outset, the player is informed of the wizard Lushifon's plot to destroy civilization and must guide Kakeru through a number of battles to defeat Lushifon.

The original DOS, FM Towns and PC-98 versions of the game feature erotic scenes. Banpresto removed these aspects before re-publishing the game for the SNES, PC-FX and PlayStation platforms. A third remake brought the game into the third dimension and brought back the erotic scenes.^[10]

Dragon Knight 4 received average reception from critics who reviewed it as an import title.^[11][12][13] According to Famitsu, the PlayStation release sold 15,351 copies in its first week on the market.^[14] The PlayStation version sold a total of 22,683 copies during its lifetime in Japan.^[14] Japanese video game magazine PCpress reported that the Microsoft Windows release ranked tenth in terms of domestic PC game sales in Japan.^[15]

German publication AnimaniA highlighted the game's atmosphere, appealing character designs, and character development throughout the plot, but found some erotic scenes unpleasant and criticized aspects such as required action commands not being able to be executed in later areas.^[16] Retro Gamer named it one of the ten best games for PC-FX, commenting that the game has attractive graphics, a moderately deep and engaging battle system, and a decent storyline.^[17] Hardcore Gaming 101's Diogo Martins wrote that "Dragon Knight 4 is a great example of an erotic game that is actually good, and one that a lot of SRPG fans would most likely enjoy".^[18]