The Battle of Olympus: Battle of Olympus - Jump from Stairs

The Battle of Olympus: Jump from Stairs is a ROM hack for the Nintendo Entertainment System that modifies the original game's stair mechanics. Players can now jump while climbing stairs and drop down by holding down on the D-pad while pressing the jump button. This hack aims to enhance gameplay fluidity, addressing perceived rigidity in the original stair navigation, and is compatible with the US version of the game.

Description

This is a hack for players who think the stairs in The Battle of Olympus feel too rigid.

It is a small hack that allows the player to jump while climbing stairs in the game. You may also drop down from stairs by holding D-pad down while pressing A (jump). Left/right velocity is maintained.

Compatability

This was made for the US version of The Battle of Olympus.

It is tested and compatible with https://www.romhacking.net/hacks/3600/. Apply the SRAM EDITION patch first.

The Battle of Olympus - Jump from Stairs v1.0 (2023-11-16)
by initsu

This is a hack to allow the player to jump while climbing stairs.
Additionally, you can hold D-pad down while pressing A (jump) on
stairs to drop down. Left/right velocity is maintained.

The reason I made this hack is that the stair climbing in this classic
game felt rigid (to me) compared to many other platform games.

This is my first ROM hack but I think it turned out very nicely.

Patching
========
Base ROM should be: "Battle of Olympus, The (U) [!]"

Optional step 1: Apply "Battle of Olympus - SRAM EDITION v1.1" if desired.
This hack is tested and compatible with this.
(v1.1, future versions unknown)

Step 2: Apply "Battle of Olympus - Jump from Stairs.ips"

License: Public Domain
======================
I release this as public domain. Use this as you want. You may include
it in your own hacks, etc.

Programming notes
=================
First, I moved the existing stair climbing logic to an empty later
part of the ROM. This was to create space to add additional logic. If
jump is not pressed, I go to the old (moved) code. If the jump button
is pressed, I call the existing jump subroutine. (This button check was
previously never done while in the climbing state.) In this case, I
also clear the climbing stairs state bytes. Finally, if D-pad down is
also pressed, I remove any upwards velocity from the jump, and thus
making it into a drop (while still maintaining the in-air state).

Database match: Battle of Olympus, The (USA)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: DC1ED05F850070CCD73DC1D0F52CDA0277A0EF05
File CRC32: B99394C3
ROM SHA-1: 6027C3631B18C7352531E4339D7B33D12C4C4E97
ROM CRC32: 6B53006A

NES Cores

Release Date

Nov 7, 2023

1 years ago

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