RULESETS are single-click options that will instantly enable/disable a set of options that we think is optimal for play, allowing you to get started without any prior knowledge. They can be further customized after being enabled.

FRENCH VANILLA is a Quality-of-Life ruleset that maintains the feel and approximate difficulty of the base game, but implements many subtle changes and improvements to make it more fun and less frustrating. If you've never played before, just enabling this will give you a solid play experience.
It's also compatible with LOST KEYS (and vice versa).

LOST KEYS is a randomizing ruleset designed for unique pathing, experimental routing, and risky choices. In LOST KEYS, the Key Items (Gems/Book) and Wings appear only *once* each, scattered around the world. Shannons (an NPC in every inn) will give you hints on where they are.
It has two modes to choose from: PROGRESSIVE, and OPEN WORLD.

• PROGRESSIVE: Search each region, and gamble on when to move on. 
  • Each Gem and a single Wing is available in its region (the area up to the point where vanilla progression requires it). It will either be held by a chest, a gifter (any non-Wingsmith NPC that grants items), or the boss.
  • Wind and Water share an area for both Gems and Wings, but the Water Jewel can also appear in chests in Blue Cave and Skye, or on Nepty.
  • Fire and Book share an area for both Gems and Wings, but the Book can also appear anywhere from the chest behind Fargo to Brannoch Castle Roof.
  • Crystal Valley Postern is enabled: an invisible shortcut warp to the Crystal Valley, hidden outside the Larapool inn back door when the town is not drained. It requires the Water Jewel to activate.
  • In the Fire region (Limelin/Dindom), along with Red/Black Wings, there are new "Ivory Wings". Ivory Wings replace White Wings, and teleport to Shamwood. Lavaar is considered the Ivory Wingsmith by all options. 
  • Fire Ruby is required to enter Brannoch Castle's outer gate. 
  • Spells are shuffled.
  • Some randomizations and options cannot be disabled. 
•  OPEN WORLD: Search each region, and rush the endgame as soon as you feel brave enough.  
  • All progression locks are unlocked, except for final Shannons. 
  • Each Key Item (Gems/Book) is available in a random Lost Keys region (like PROGRESSIVE, but with key items shuffled between the default region slots.) All four Elemental Gems are required to traverse Brannoch Castle roof and the Book is still required to enter Mammon's World.
  • One of each Wing is scattered among all possible item locations with no logic. 
  • Crystal Valley Postern enabled (and unlocked).
  • Spells are shuffled.
  • Some randomizations and options cannot be disabled.

• Shuffle spell properties: Shuffle the properties of all spells, except for unlock level, element, and menu position.
  • Optional: give the new spells new procedural hinted names.
  • Optional: guarantee Healing Lv1 appears early.
  • Optional: add a second Healing Lv1 in a different element, which replaces Soul Search Lv1. If "Guarantee early Healing" is also enabled, this option will also guarantee Vampire's Touch appears early in a third element.
  • Optional: force the four most powerful spells (Avalanche, Magic Barrier, Water Pillar Lv3, Large Cutter) to each be distributed into different elements.
  • Optional: update the descriptions of spell items to describe their new function, and their names to reflect their new element.
  • Optional: add special fixes for specific spell combinations, allowing them to be added to the randomization pool.
• Raise element level cap to 99: Spirits can be assigned to elements up to level 99, instead of only 50. 
• Maximum accuracy: Normalizes accuracy values to 100. This does not mean no misses, but it means the same hit rate based on Agi as any default spell.
  
• All spells Soul Search: All spells have a chance to trigger the Soul Search effect on hit. Has a side effect of increasing MP experience gain.
  
• Base spells unlock at Level 2: Basic level 1 spells will not be available until you have put at least one spirit into that element.
• Rebalance spell damage: Generally tweak many spells' damage values to make them more viable overall, especially when shuffled.
• All spells unlocked at Level 1: Set all spell unlock levels to 1, for testing purposes.

For each category (Chests/Drops/Gifters/Wingsmiths), there is a checklist of items below, and every item that is checked will have an equal chance to appear in those category's item slots. The dropdown menus to the right of each category have premade easy item sets, which will overwrite the table if selected. 
If LOST KEYS is enabled, it will distribute its required Key Items and Wings before filling in the rest with the specified item tables.

• Randomize Chests: Alter the contents of all chests.
  • Optional: "Weighted" - guarantee a minimum of one/two of each item.
• Randomize Drops: Alter the items dropped by every non-Boss enemy.
  • Optional: "Weighted" - guarantee a minimum of one/two of each item.
  • Optional: disable the item drop limit check.
• Randomize Gifters: Alter the items granted by every item Gifter.
  • Optional: ensure final Shannons carry default items.
  • Optional: update Gifter/Wingsmith text to new items.
• Randomize Wingsmiths: Alter the items granted by every Wingsmith.
• Unlock Wing use: Unlock the use of wings in interiors (buildings, towns, dungeons), on the Isle of Skye, or both.
  
• Make Dew Drop useful: Dew Drops heal an additional 20 HP.

• Randomize monster stats: Randomizes enemy stats within regions. All enemies in a region will receive new stat values based on the range of vanilla stats in that region.
  • Optional: increase the range's variance beyond normal limits.
• Enemy stat scaling: Multiplies all enemy stats.
• Recalculate monster experience: Recalculates EXP based on new stats, to make higher scaling/variance possible. Highly recommended if stats have been altered.
• Shuffle boss order: Shuffles and scales all bosses but Beigis and Mammon. Item progression is maintained.
• Remove Boss spell debuff: Boss spells no longer debuff the player with passive Invalidity effect (which removes buff effects, making them mostly useless in the vanilla game).
  
• Randomize Guilty's element: Randomizes Guilty's element, so they no longer resist all elements equally.
• Encounter Rate: Set the encounter rate, between halved/reduced/default/increased/doubled.
• Combat Experience: Set a multiplier on combat experience, from 0x - 3x, in 0.25 increments. Does not affect HP/MP/Def/Agi experience.

• Modify starting stats: Customize Brian's starting HP, MP, Agi, and Def.
• Modify walking MP regain rate: Set MP regain rate from 1/3x to 3x, or OFF.
• Modify staff hit MP regain rate: Set MP regain per hit from from 0 to 5.
• Numerical combat experience: Change the Pause menu EXP display from percentage to amount remaining.

• Fast Monastery: Speeds up the Monastery, by causing the Grand Abbott's exit door to teleport you into the long hallway by the courtyard and church.
  
• Fast Mammon's World: Speeds up the Monastery, by skipping the checkerboard dark passages with no enemies.
• Fast Shamwood: Speeds up Shamwood by warping you back to the Baragoon Tunnel exit when you leave.
  
• Crystal Valley Postern: Creates a warp behind the inn in lower flooded Larapool that leads back to the Crystal Valley if the Water Jewel is obtained. [NOTE - There is a known issue with the door data for this warp: if you find yourself stuck or unable to open menus after warping, press Z to fix it.]
• Replace White Wings with Ivory Wings: Replaces the White Wings with Ivory Wings, which warp the player to Shamwood. The Melrode Wingsmith will not grant an item, and instead Lavaar in Shamwood will grant the Ivory Wings upon interacting. SHUFFLED Wingsmiths treat Lavaar as the granter of the Ivory Wings and shuffle accordingly.
• Unlock all progression locks: Unlocks all progression-related locks. Gems, Book, and Key are no longer required to progress.
• Lock Mammon's World with Gems: Locks the four final doorways leading to the shrine on Brannoch Castle roof, with each Elemental Gem in order. Overrides 'Unlock all progression locks'.
• Brannoch Blue House warp to Shamwood: Creates a warp back to Shamwood. 
  The warp is the door of Jannat's house in Brannoch, a squat blue house near the inn.
• Shannon Hints: One Shannon in each region will now give a hint to the location of that region's progression item. Requires LOST KEYS to be enabled.
• Reveal hidden spirits: Makes two previously-invisible spirits visible (Ferry and Library.)
• Put Book in Fire Region: A major change to LOST KEYS item logic that is now enabled by default. Causes Book region to overlap with Fire, like Water overlaps with Wind. Requires LOST KEYS, can be optionally disabled.

• Vowel play: Monster names may be... strange.
  
• Music shuffle: Randomizes BGM everywhere but the title screen and boss battles.
• Restless NPCs: All NPCs have the 'wandering' byte flag.
• Randomize textboxes: Redistribute all textbox content.
• Celtland Drift: Brian's got places to go, collisions be damned.
• Gravity Disaster: All enemies have a randomized 'flying' byte flag.

• Set text palette: Changes the default text colour palette. 
  • Optional: Reveal the palette, or enter a custom hue shift value.
• Set staff palette: Changes the palette for Brian's staff.
  • Optional: Reveal the palette, or enter a custom hue shift value.
    
• Set cloak palette: Changes the palette for Brian's cloak.
  • Optional: Reveal the palette, or enter a custom hex colour value.
• Random spell palettes: Randomizes spell palettes among a decent colour range.
• Random Brian's palettes: Randomizes some of Brian's clothing palette.

• Increase zoom range: Changes maximum zoom distance. Can range from 1 (default) to 12 (maximum).
• Maximum message speed: Changes default textbox message speed to maximum, for convenience.
• Lock HUD onscreen: Prevents the HUD from sliding out once it appears.
• Minor text improvements: Adds explanatory dialogue about LOST KEYS to the Abbott and Melrode Shannon, if LK is enabled. Corrects a couple of unclear localizations.

• Mode: Choose whether to directly patch your Z64 files, or to create IPS patches. Z64 files will auto-repair checksums.
• Filename: IPS patch filename. Default is 'merrowpatch_(seed)'. It will also create a 'filename + Spoiler.txt' file in the same directory.
• Verbose Spoiler Log: List all randomizations at the bottom of the log output.
• Add Seed to Title Screen: Adds the Seed to the title screen as series of icons, for comparing/verifying race files, etc.
• Seed: Auto-generated pseudorandom seed. Can be edited.