Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

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  • Data D5: Battle data: combatant definitions and the abilities table (with J1)
    Open
    • Is something wrong?
    enhancement priority: medium scripting

    Difficulty 4/5 3-5 days Newbie friendliness 38/100

    joelnl74/Hydro#172 ·

    Maintainers usually reply within 1 day

  • Data D4: Test bed: dialogue definitions for every NPC, the items table, NpcScript
    Open
    • Is something wrong?
    enhancement priority: high scripting

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#171 ·

    Maintainers usually reply within 1 day

  • Data D3: Editor: create and edit definitions and data tables in the inspector, pickers, validation line
    Open
    • Is something wrong?
    enhancement priority: high tooling

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#170 ·

    Maintainers usually reply within 1 day

  • Data D2: Definition and data table assets (.hydef, .hytable), DataView / DataTableView, validation
    Open
    • Is something wrong?
    enhancement priority: high scripting

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    joelnl74/Hydro#169 ·

    Maintainers usually reply within 1 day

  • Data D1: HY_DATA data types: reflection (enums, structs, lists, row references) and the canonical YAML serializer
    Open
    • Is something wrong?
    enhancement priority: high scripting

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#168 ·

    Maintainers usually reply within 1 day

  • Threading: render thread and game thread (future optimization)
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    joelnl74/Hydro#166 ·

    Maintainers usually reply within 1 day

  • Editor: undo / redo
    Open
    • Is something wrong?
    enhancement priority: high

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#165 ·

    Maintainers usually reply within 1 day

  • Runtime UI MVP: review of the new UI components and the path to menus and dialogue
    Open
    • Is something wrong?
    enhancement priority: high

    Difficulty 5/5 Over a week Newbie friendliness 20/100

    joelnl74/Hydro#164 ·

    Maintainers usually reply within 1 day

  • Rewrite the Test bed page for the field scenes
    Open
    • Is something wrong?
    documentation priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    joelnl74/Hydro#162 ·

    Maintainers usually reply within 1 day

  • Scene builder scripts (shrine_glade, farm_village) are missing from the repository
    Open
    • Is something wrong?
    documentation priority: medium tooling

    Difficulty 3/5 1-2 days Newbie friendliness 54/100

    joelnl74/Hydro#161 ·

    Maintainers usually reply within 1 day

  • Editor: small issues from the HDR / gizmo work
    Open
    • Is something wrong?
    bug priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 43/100

    joelnl74/Hydro#159 ·

    Maintainers usually reply within 1 day

  • Missing render profile logs a warning every frame in Render Settings
    Open
    • Is something wrong?
    bug priority: low

    Difficulty 2/5 1-3 hours Newbie friendliness 68/100

    joelnl74/Hydro#158 ·

    Maintainers usually reply within 1 day

  • World collision WC4-WC7: remaining items of the Jolt MVP
    Open
    • Is something wrong?
    enhancement physics priority: medium

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    joelnl74/Hydro#154 ·

    Maintainers usually reply within 1 day

  • Terrain system MVP
    Open
    • Is something wrong?
    3D renderer enhancement priority: medium

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    joelnl74/Hydro#155 ·

    Maintainers usually reply within 1 day

  • Jolt: characters ride and are pushed by moving kinematic bodies
    Open
    • Is something wrong?
    enhancement physics priority: low

    Difficulty 3/5 1-2 days Newbie friendliness 70/100

    joelnl74/Hydro#153 ·

    Maintainers usually reply within 1 day

  • Jolt: collision events (OnCollisionEnter/Exit) for 3D bodies
    Open
    • Is something wrong?
    enhancement physics priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    joelnl74/Hydro#152 ·

    Maintainers usually reply within 1 day

  • Jolt: removing a collider or Character Body during Play leaves the body in the world
    Open
    • Is something wrong?
    bug physics priority: low

    Difficulty 3/5 1-2 days Newbie friendliness 67/100

    joelnl74/Hydro#151 ·

    Maintainers usually reply within 1 day

  • Script reflection V2: more property types
    Open
    • Is something wrong?
    enhancement priority: medium scripting

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#144 · 1 comment ·

    Maintainers usually reply within 1 day

  • Saved script values are lost when a script is unregistered or renamed
    Open
    • Is something wrong?
    bug priority: medium scripting

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#143 ·

    Maintainers usually reply within 1 day

  • Colour grading and LUT in the tonemap pass
    Open
    • Is something wrong?
    3D renderer enhancement priority: low

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#137 ·

    Maintainers usually reply within 1 day

  • Pixel stability: low-resolution world or texel-snapped camera
    Open
    • Is something wrong?
    3D renderer enhancement priority: medium

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#136 ·

    Maintainers usually reply within 1 day

  • Depth of field focused on the player (tilt-shift look)
    Open
    • Is something wrong?
    3D renderer enhancement priority: medium

    Difficulty 5/5 Over a week Newbie friendliness 35/100

    joelnl74/Hydro#135 ·

    Maintainers usually reply within 1 day

  • Post P3: emissive sprites (emission colour and intensity, added after lighting)
    Open
    • Is something wrong?
    3D renderer enhancement priority: high

    Difficulty 4/5 3-5 days Newbie friendliness 48/100

    joelnl74/Hydro#132 · 1 comment ·

    Maintainers usually reply within 1 day

  • Editor gizmos for lights, shadows and paths
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 50/100

    joelnl74/Hydro#104 ·

    Maintainers usually reply within 1 day

  • Normal maps on sprites
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 42/100

    joelnl74/Hydro#103 ·

    Maintainers usually reply within 1 day

  • 2D particles
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    joelnl74/Hydro#101 ·

    Maintainers usually reply within 1 day

  • Sprite materials and animated shaders
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 5/5 Over a week Newbie friendliness 30/100

    joelnl74/Hydro#100 ·

    Maintainers usually reply within 1 day

  • 2D camera follow and bounds
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 3/5 1-2 days Newbie friendliness 55/100

    joelnl74/Hydro#97 ·

    Maintainers usually reply within 1 day

  • Waypoint path follower
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 3/5 1-2 days Newbie friendliness 62/100

    joelnl74/Hydro#98 ·

    Maintainers usually reply within 1 day

  • Input pressed / released this frame
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 2/5 Half a day Newbie friendliness 72/100

    joelnl74/Hydro#94 ·

    Maintainers usually reply within 1 day

  • Entity hierarchy
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 5/5 Over a week Newbie friendliness 30/100

    joelnl74/Hydro#95 ·

    Maintainers usually reply within 1 day

  • Sprite size, Single-texture pivot and per-axis tiling
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 3/5 1-2 days Newbie friendliness 65/100

    joelnl74/Hydro#93 ·

    Maintainers usually reply within 1 day

  • Sorting layers and a Y-sort mode
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 50/100

    joelnl74/Hydro#91 ·

    Maintainers usually reply within 1 day

  • Tilemaps and terrain blending
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    joelnl74/Hydro#92 ·

    Maintainers usually reply within 1 day

  • Light animation and time of day
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    joelnl74/Hydro#90 ·

    Maintainers usually reply within 1 day

  • Spot lights, light offset and cookies
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    joelnl74/Hydro#89 ·

    Maintainers usually reply within 1 day

  • Real 2D shadow casters
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 40/100

    joelnl74/Hydro#88 ·

    Maintainers usually reply within 1 day

  • Emissive / unlit sprites
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    joelnl74/Hydro#87 · 1 comment ·

    Maintainers usually reply within 1 day

  • Texture atlas packer at import / cook time
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    joelnl74/Hydro#85 · 1 comment ·

    Maintainers usually reply within 1 day

  • Editor: optionally play sprite animations in the Editor window while editing
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 3/5 1-2 days Newbie friendliness 68/100

    joelnl74/Hydro#84 ·

    Maintainers usually reply within 1 day

  • Project window: small cached thumbnails instead of whole textures
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 3/5 1-2 days Newbie friendliness 58/100

    joelnl74/Hydro#83 · 1 comment ·

    Maintainers usually reply within 1 day

  • Texture import: mipmaps, max size and compression
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 45/100

    joelnl74/Hydro#82 · 1 comment ·

    Maintainers usually reply within 1 day

  • Nine-slice sprites: borders in the Sprite Editor and nine-quad drawing
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 55/100

    joelnl74/Hydro#81 ·

    Maintainers usually reply within 1 day

  • Sprite Editor: drag sprite rectangles and pivots on the image; slice non-grid sheets
    Open
    • Is something wrong?
    enhancement priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 55/100

    joelnl74/Hydro#80 ·

    Maintainers usually reply within 1 day

  • Animator state machine for sprites (states, parameters, transitions, 2D blend)
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 5/5 Over a week Newbie friendliness 25/100

    joelnl74/Hydro#78 · 1 comment ·

    Maintainers usually reply within 1 day

  • Sprite animation: deliver animation events to scripts (OnAnimationEvent)
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 52/100

    joelnl74/Hydro#77 · 1 comment ·

    Maintainers usually reply within 1 day

  • Tests and CI: doctest project and a GitHub Actions build
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 72/100

    joelnl74/Hydro#74 · 2 comments ·

    Maintainers usually reply within 1 day

  • Build in MSVC at /W4 with validation, then turn on FatalWarnings
    Open
    • Is something wrong?
    enhancement priority: medium

    Difficulty 4/5 3-5 days Newbie friendliness 55/100

    joelnl74/Hydro#73 · 1 comment ·

    Maintainers usually reply within 1 day

  • Run clang-format once: ~285 if/else/loop bodies without braces
    Open
    • Is something wrong?
    enhancement good first issue priority: low

    Difficulty 3/5 3-5 days Newbie friendliness 55/100

    joelnl74/Hydro#72 ·

    Maintainers usually reply within 1 day

  • LayerStack owns layers through raw new/delete; PopLayer leaks
    Open
    • Is something wrong?
    enhancement good first issue priority: low

    Difficulty 4/5 3-5 days Newbie friendliness 35/100

    joelnl74/Hydro#70 ·

    Maintainers usually reply within 1 day

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