This is a entrance randomizer for The Legend of Zelda: A Link to the Past for the SNES. See https://alttpr.com/ for more details on the normal randomizer.
Clone this repository and then run
EntranceRandomizer.py (requires Python 3).
Gui.py for a simple graphical user interface.
For releases, a Windows standalone executable is available for users without Python 3.
Fixes Hyrule Castle Secret Entrance and Front Door, but may lead to weird rain state issues if you exit through the Hyrule Castle side exits before rescuing Zelda in a full shuffle.
Gives lightcone in Hyrule Castle Sewers even without the Lamp.
This mode starts with the option to start in your house or the sanctuary, you are free to explore.
- Uncle already in sewers and most likely does not have a sword.
- Sewers do not get a free light cone.
- It may be a while before you find a sword, think of other ways to do damage to enemies. (bombs are a great tool, as well as picking up bushes in over world).
This mode removes all swords from the itempool. Otherwise just like open.
- The Medallions to open Misery Mire and Turtle Rock can be used without a sword if you stand on the symbol.
- The curtains in Skull Woods and Hyrule Castle Tower that normally require a sword to cut have been removed.
- Ganon takes damage from the Hammer.
- The magic barrier to Hyrule Castle Tower can be broken with a Hammer.
- The Hammer can be used to activate the Ether and Bombos tablets.
This determines the Item Requirements for each location.
The game can be completed without knowing how to perform glitches of any kind.
May require Fake Flippers, Bunny Revival.
Items are placed without regard for progression or the seed being possible. Major glitches are likely required.
Standard game completion requiring you to collect the 7 crystals, defeat Agahnim 2 and then beat Ganon.
Places the Triforce at the Master Sword Pedestal. Ganon cannot be damaged.
Ganon cannot be damaged until all dungeons (including Hyrule Castle Tower and Ganons Tower) are cleared.
Triforce Pieces are added to the item pool, and some number of them being found will trigger game completion. Ganon cannot be damaged. By default 30 Triforce Pieces are placed while 20 are needed to beat the game. Both values can be adjusted with the custom item pool feature.
Standard game completion requiring you to collect the 7 crystals and then beat Ganon.
This is only noticeably different if the the Ganon shuffle option is enabled.
This setting doubles the number of swords, shields, armors, bottles, and silver arrows in the item pool. This setting will also triple the number of Lamps available, and all will be obtainable before dark rooms. Within dungeons, the number of items found will be displayed on screen if there is no timer.
This is the default setting that has an item pool most similar to the original The Legend of Zelda: A Link to the Past.
This setting reduces the availability of a variety of minor helpful items, most notably limiting the player to two bottles, a Tempered Sword, and Blue Mail. Several minor game mechanics are adjusted to increase difficulty, most notably weakening potions and preventing the player from having fairies in bottles.
This setting is a more extreme version of the Hard setting. Potions are further nerfed, the item pool is less helpful, and the player can find no armor, only a Master Sword, and only a single bottle.
This setting is a modest step up from Expert. The main difference is that the player will never find any additional health.
Does not invoke a timer.
Displays a timer on-screen but does not alter the item pool. This will prevent the dungeon item count feature in Easy and Keysanity from working.
Displays a count-up timer on screen that can be reduced with Green Clocks and Blue Clocks or increased with Red Clocks found in chests that will be added to the itempool.
Displays a countdown timer on screen that, when it hits zero, will put the player into a one hit knockout state until more time is added to the clock via some of the Green Clocks that will be added to the itempool.
The player will be in a one hit knockout state the entire game. This is the same as Timed-OHKO except without the Clock items and the timer permanently at zero.
Displays a countdown timer on screen that can be increased with Green Clocks and Blue Clocks or decreased with Red Clocks found in chests that will be added to the itempool. The goal of this mode is to finish the game without the timer reaching zero, but the game will continue uninterrupted if the player runs out of time.
Determines if Sword, Shield, and gloves are progressive (upgrading in sequence) or not.
This setting makes swords, shields, armor, and gloves progressive. The first of any type of equipment found by the player will be the lowest level item, and each subsequent find of a category will upgrade that type of equipment.
This setting makes swords, shields, armor, and gloves non-progressive. All of the items of these types will be randomly placed in chests, and the player could find them in any order and thus instantly receive high level equipment. Downgrades are not possible; finding a lower level piece of equipment than what is already in the player's possession will simply do nothing.
This setting makes swords, shields, armor, and gloves randomly either progressive or not. Each category is independently randomized.
Item Distribution Algorithm
Determines how the items are shuffled.
This is a variation of VT26 that aims to strike a balance between the overworld heavy VT25 and the dungeon heavy VT26 algorithm. It does this by reshuffling the remaining locations after placing dungeon items.
Items and locations are shuffled like in VT25, and dungeon items are now placed using the same algorithm. When Ganon is not shuffled it includes a slight deliberate bias against having too many desireable items in Ganon's Tower to help counterbalance the sheer number of chests in that single location.
Items and locations are shuffled and placed from the top of the lists. The only thing preventing an item from being placed into a spot is if is absolutely impossible to be there given the previous made placement choices. Leads to very uniform but guaranteed solvable distributions.
The ordinary VT v8.22 algorithm. Fixes issues in placement in VT21 by discarding all previously skipped and unfilled locations after 2/3 of the progression items were placed to prevent stale late game locations from soaking up the same items all the time.
The ordinary VT v8.21 algorithm. Unbiased placement of items into unlocked locations, placing items that unlock new locations first. May lead to distributions that seem a bit wonky (high likelyhood of ice rod in Turtle Rock, for instance)
Pushes out items starting from Link's House and is slightly biased to placing progression items with less restrictions. Use for relatively simple distributions.
Alternative approach to VT22 to improve on VT21 flaws. Locations that are skipped because they are currently unreachable increase in staleness, decreasing the likelihood of receiving a progress item.
Entrance Shuffle Algorithm
Determines how locations are shuffled. In all modes other than Insanity and the similar legacy versions, holes shuffle as a pair with the connecting cave and the front two sections of Skull Woods remain confined to the general Skull Woods area. Link's house is never shuffled as a design decision.
Places entrances in the same locations they were in the original The Legend of Zelda: A Link to the Past.
Shuffles dungeon entrances between each other and keeps all 4-entrance dungeons confined to one location such that dungeons will one to one swap with each other. Other than on Light World Death Mountain, interiors are shuffled but still connect the same points on the overworld. On Death Mountain, entrances are connected more freely.
Uses dungeon shuffling from Simple but freely connects remaining entrances. Caves and dungeons with multiple entrances will be confined to one world.
Mixes cave and dungeon entrances freely. Caves and dungeons with multiple entrances will be confined to one world.
Mixes cave and dungeon entrances freely, but now connector caves and dungeons can link Light World and Dark World.
Decouples entrances and exits from each other and shuffles them freely. Caves that were single entrance in vanilla still can only exit to the same location from which they were entered.
Similar to the base shuffles, but the distinction between single entrance and multi-entrance caves from older versions of the randomizer is maintained. Madness_Legacy is the more similar to the modern Insanity. Insanity_Legacy has fake worlds and guaranteed Moon Pearl and Magic Mirror for a very different experience.
The dungeon variants only mix up dungeons and keep the rest of the overworld vanilla.
Heartbeep Sound Rate
Select frequency of beeps when on low health. Can completely disable them.
Select the color of Link's hearts.
A setting that lets the player set the rate at which the menu opens and closes.
Create Spoiler Log
Output a Spoiler File.
Do not Create Patched Rom
If set, will not produce a patched rom as output. Useful in conjunction with the spoiler log option to batch generate spoilers for statistical analysis.
Enable L/R button quickswapping
Use to enable quick item swap with L/R buttons. Press L and R together to switch the state of items like the Mushroom/Powder pair.
This setting allows dungeon specific items (Small Key, Big Key, Map, Compass) to be distributed anywhere in the world and not just in their native dungeon. Small Keys dropped by enemies or found in pots are not affected. The chest in southeast Skull Woods that is traditionally a guaranteed Small Key still is. These items will be distributed according to the v26/balanced algorithm, but the rest of the itempool will respect the algorithm setting. Music for dungeons is randomized so it cannot be used as a tell for which dungeons contain pendants and crystals; finding a Map for a dungeon will allow the overworld map to display its prize.
This setting turns all Small Keys into universal Small Keys that can be used in any dungeon and are distributed across the world. The Bow now consumed rupees to shoot; the cost is 10 rupees per Wood Arrow and 50 per Silver Arrow. Shooting Wood Arrows requires the purchase of an arrow item from shops, and to account for this and the dynamic use of keys, both Wood Arrows and Small Keys will be added to several shops around the world. Four "take any" caves are added that allow the player to choose between an extra Heart Container and a Bottle being filled with Blue Potion, and one of the four swords from the item pool is placed into a special cave as well. The five caves that are removed for these will be randomly selected single entrance caves that did not contain any items or any shops. In further concert with the Bow changes, all arrows under pots, in chests, and elsewhere in the seed will be replaced with rupees.
Place Dungeon Items
If not set, Compasses and Maps are removed from the dungeon item pools and replaced by empty chests that may end up anywhere in the world. This may lead to different amount of itempool items being placed in a dungeon than you are used to.
Only Ensure Seed Beatable
If set, will only ensure the goal can be achieved, but not necessarily that all locations are reachable. Currently only affects VT25, VT26 and balanced algorithms.
Include Ganon's Tower and Pyramid Hole in Shuffle pool
If set, Ganon's Tower is included in the dungeon shuffle pool and the Pyramid Hole/Exit pair is included in the Holes shuffle pool. Ganon can not be defeated until the primary goal is fulfilled. This setting removes any bias against Ganon's Tower that some algorithms may have.
Include Helpful Hints
If set, the 15 telepathic tiles and 5 storytellers scattered about Hyrule will give helpful hints about various items and entrances. An exact breakdown of the hint distribution is provided as an included text file.
Use Custom Item Pool
If set, the item pool normally associated with your difficulty setting is replaced by the item pool specified in the custom tab. This feature is only supported when the randomizer is run via the GUI; attempting to set this via the command line does nothing.
Can be used to set a seed number to generate. Using the same seed with same settings on the same version of the entrance randomizer will always yield an identical output.
Use to batch generate multiple seeds with same settings. If a seed number is provided, it will be used for the first seed, then used to derive the next seed (i.e. generating 10 seeds with the same seed number given will produce the same 10 (different) roms each time).
Command Line Options
Show the help message and exit.
Output a Spoiler File (default: False)
Select the game logic (default: noglitches)
Select the game mode. (default: open)
Select the game completion goal. (default: ganon)
Select the game difficulty. Affects available itempool. (default: normal)
Select the timer setting. (default: none)
Select the setting for progressive equipment. (default: on)
Select item distribution algorithm. (default: balanced)
Select entrance shuffle algorithm. (default: full)
Path to a Japanese 1.0 A Link to the Past Rom. (default: Zelda no Densetsu - Kamigami no Triforce (Japan).sfc)
Select level of logging for output. (default: info)
Define seed number to generate. (default: None)
Set the count option (default: None)
Use to enable quick item swap with L/R buttons. (default: False)
Alters the rate at which the menu opens and closes. (default: normal)
Disables game music, resulting in the game sound being just the SFX. (default: False)
Enable Keysanity (default: False)
Enable Retro mode (default: False)
If set, Compasses and Maps are removed from the dungeon item pools and replaced by empty chests that may end up anywhere in the world. This may lead to different amount of itempool items being placed in a dungeon than you are used to. (default: False)
Select frequency of beeps when on low health. (default: normal)
Select the color of Link's heart meter. (default: red)
Use to select a different sprite sheet to use for Link. Path to a binary file of length 0x7000 containing the sprite data stored at address 0x80000 in the rom. (default: None)
Enables the "Only Ensure Seed Beatable" option (default: False)
Enables helpful hints from storytellers and telepathic tiles (default: False)
Disables the "Include Ganon's Tower and Pyramid Hole in Shuffle pool" option. (default: Enabled)
Enables the "Do not Create Patched Rom" option. (default: False)
Open the graphical user interface. Preloads selections with set command line parameters.