Castlevania II: Simon’s Quest is an action platformer game for the Nintendo Entertainment System.

This hack modernizes the control scheme of Castlevania 2 to make it less frustrating to people used to tighter controls as in Symphony of the Night and Mega Man. It primarily allows the player greater control while jumping and on stairs.

In addition, Simon now blinks when he has invincibility frames, like in Castlevania 1 and 3.

Complete list of changes:

- Enables the player to control their x-velocity in mid-air while jumping (including while jump-attacking).
- (Optional) When releasing the jump button, Simon immediately starts falling again; this allows the player to make smaller hops if desired.
- After being knocked back, the player regains control after a split second and can angle their fall.
- When walking off an edge, the player retains control instead of dropping straight down.
- The player can jump off of stairs at any point in the climb. (However, it is still impossible to land on stairs, so be careful jumping from long flights of stairs over pits.)
- If the player is struck by an enemy while climbing stairs, they will not be knocked off the stairs. This is the same as the behaviour in Castlevania 1 and 3.
- Simon blinks rapidly after getting hit, as in Castlevania 1 and 3.

Compatibility has been verified with the following hacks:
- TheAlmightyGuru's Simon's Redaction
- tkempkes's Annoyance Fixes
- NaOH's Game Over Penalty Reduction

An additional version is included which is compatible with:
- Bisqwit's Castlevania II English Re-translation (+Map) -- NOTE: some users have reported that a more recent version of the re-translation has been released which is no longer compatible with this hack. You may need to get a version of the re-translation from before July 2020. There is a review posted below which may have more information. There is no timeline currently for when the improved controls hack will be updated to restore compatibility.

Similar to the Castlevania 1 hack found [url=https://www.romhacking.net/hacks/3867/][u]here[/u][/url] and the Akumajou Densetsu (Castlevania 3) hack found [url=https://www.romhacking.net/hacks/3596/][u]here[/u][/url].

Use Lunar IPS to apply the hack to your Castlevania 2 ROM file.

The source code for this hack is available on github.

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Updates:

- V1.1: Increased invincibility frames flicker to 30 Hz, matching the other two games. (In vanilla CV2, there is no indication for invincibility frames at all.)
- V1.2: Fixed softlock during the intro cutscene for the final boss.
- V1.3: Added (1) a patch for Bisqwit's retranslation + map hack, and (2) a README file, and (3) byte-level documentation for the hack.
- V1.4: Updated compatibility for Bisqwit's retranslation (now compatible with v2.9.9.1 / 2020-07-1 and v2.12.0.1 / 2020-08-16) and no-vcancel version.

No-Intro Name: Castlevania II - Simon's Quest (USA)
(No-Intro version 20130731-235630)
File SHA-1: D6B96FD98AE480C694A103FE9A5D7D84EEAFB6F7
ROM SHA-1: 2447D6133573F7ED2CC49DC95B3130427BD4DC35