This is a multilingual font, and will likely be a perennial work in progress. Feel free to suggest the addition of new scripts and glyphs, as well as changes to existing glyphs (esp. non-Latin).

Largest font tagged with 'segment'. ≥191 languages supported from 30 scripts (Arabic*, Latin, Cyrillic, Hebrew, Greek, Braille, Emoji*, Bopomofo, Hangul Jamo, Armenian, Katakana, NKo*, Lisu, Lydian, Ol Chiki*, Mro*, Toto*, Tengwar CSUR*, Cirth CSUR*, Shavian, Klingon CSUR, Nag Mundari*, Multani, Pau Cin Hau*, Hanifi Rohingya*, Bassa Vah*, Phagspa, uppercase Cherokee). Partial support for 6 languages (Korean, Japanese, Mandarin, Hokkien, Cia-Cia, Tibetan). 5 game sets supported (Mahjong, Chess, Draughts, Dice, Playing Cards). 14160 B of ROM for a full hardware implementation.

Turkish users, the lowercase i is dotted without serifs and dotless with serifs.

(Burmese is next to be added to this font)

a pixelated unicode font that can be read at small sizes.

14 sept '22, 17:47:11 hkt / massive update. added coptic, spacing modifier letters and improved readability.

What if GS Unicode wasn't just made of pixels?  What if it had a better, more appealing width/height ratio?  What if it utilized the new FS inventory?  And what if I wasn't way too ambitious/crazy in making this?  No idea, but I'm eager to find out!

I've split this font series up by plane since font files have a technical limit of 65,535 glyphs.

Things that are planned but not (fully) implemented yet are italicized.

This font (Plane 0) should also serve as the hub for most major updates (like those relating to the series as a whole).

Links to planes:

Plane 0: [THIS FONT]
Plane 1: here
Plane 2
Plane 3
(No Unicode characters exist in Planes 4 through D as of U15.0)
Plane E: here
Plane F: here
Plane 10: here

PUA assignments:

E000~E07F - Tengwar
E080~E0FF - Cirth
E100~E14F - Engsvanyali [Engsvanyáli]
E150~E1AF - Kinya
E1B0~E1CF - Ilianore
E1D0~E1FF - Syai
E200~E26F - Verdurian
E270~E28F - aUI
E290~E2BF - Amman-Iar
E2C0~E2CF - Streich
E2D0~E2FF - Xaini [Xaîni]
E300~E33F - Mizarian
E340~E35F - Zirinka [Zírí:nka]
E360~E37F - Sarkai
E380~E3AF - Thelwik
E3B0~E3FF - Olaetyan
E400~E42F - Niskloz [Nísklôz]
E430~E44F - Kazat Akkorou [Kazat ?Akkorou]
E450~E46F - Kazvarad
E470~E48F - Zarkhand [Zarkhánd]
E490~E4BF - Rozhxh [Røzhxh]
E4C0~E4EF - Serivelna
E4F0~E4FF - Kelwathi
E500~E51F - Saklor
E520~E54F - Rynnan
E550~E57F - Alzetjan
E580~E59F - Telarasso
E5A0~E5BF - Ssuraki [Ssûraki]
E5C0~E5DF - Gargoyle
E5E0~E5FF - Ophidian
E600~E62F - Ferengi
E630~E64F - Seussian Latin Extensions
E650~E67F - Sylabica
E680~E6CF - Ewellic
E6D0~E6EF - Amlin
E6F0~E73F - Unifon Extended-1
E740~E76F - Unifon
E770~E77F - Solresol
E780~E7FF - Visible Speech
E800~E82F - Monofon
E830~E88F - Dni [D'ni]
E890~E8DF - Aurebesh
E8E0~E8FF - Tonal
E900~E97F - Glaitha-A
E980~E9FF - Glaitha-B
EA00~EA9F - Lhenazi
EAA0~EAFF - Wanya
EB00~EB3F - Orokin
EB40~EB5F - Standard Galactic
EB60~EB9F - Braille Extended-1
EBA0~EBDF - Cistercian Numerals
EBE0~EBEF - Lapointe Hexadecimal Numerals
EBF0~EBFF - Martin Hexadecimal Numerals
EC00~EC2F - Cylenian
EC30~EC6F - Syrrin
EC70~ECEF - Graflect
ECF0~ECFF - Whitaker Hexadecimal Numerals
ED00~ED3F - Deini
ED40~ED7F - Niji
ED80~EDAF - Iranic
EDB0~EDDF - Tassarunese
EDE0~EDEF - Zese
EDF0~EDFF - Grawlixes
EE00~EEFF - <unassigned>
EF80~F2FF - Latin Extended-1
F300~F3FF - Combining Diacritical Marks Extended-1
F400~F4BF - Symbols and Punctuation Extended-1
F4C0~F4EF - Ath
F4F0~F4FF - Number Forms Extended-1
F500~F5FF - Greek Extended-1
F600~F6FF - Cyrillic Extended-1
F700~F71F - Hebrew Extended-1
F720~F7BF - <unassigned>
F7C0~F7FF - Kana Extended-1
F800~F87F - Miscellaneous Symbols and Arrows Extended-1
F880~F89F - Font Specifics
F8A0~F8CF - Aiha [Aiha (Kesh)]
F8D0~F8FF - Klingon

Additional PUA assignments can be found in the Plane F and 10 fonts.

Feel free to recommend PUA assignments!

Also, it's more than likely I won't know every script well enough that there won't be any mistakes.  If/when I make a mistake, please tell me and I'll do my best to fix it!

I am going to expand this font. Why not, after all? It is my best work so far.

ALL BLOCKS UPDATED TO UNICODE 16.0!!

UNICODE BLOCKS INCLUDED:
Basic Latin
Latin Supplement
Latin Extended A
Latin Extended B
Latin Extended Additional
Latin Extended C
Latin Extended D
Latin Extended E
Latin Extended F
Latin Extended G
-
IPA Extensions
Spacing Modifier Letters
Phonetic Extensions
Phonetic Extensions Supplement
Modifier Tone Letters
Ancient Symbols
Halfwidth and Fullwidth Forms (only Latin, Symbols and Katakana)
-
Cyrillic (Basic)
Cyrillic Supplement
Cyrillic Extended A
Cyrillic Extended B
Cyrillic Extended C
Cyrillic Extended D
(Anbur/Old Permic)
-
Greek and Coptic
Greek Extended
-
Ethiopic
Ethiopic Supplement
Ethiopic Extended 
Ethiopic Extended A
Ethiopic Extended B
-
Armenian (Would really appreciate feedback)
Hebrew
N'Ko
Georgian
Georgian Extended
Georgian Supplement
Unified Canadian Aboriginal Syllables
Unified Canadian Aboriginal Syllables Extended
Unified Canadian Aboriginal Syllabics Extended-A
Cherokee
Cherokee Supplement
Ogham
Runic
Tifinagh
Lisu
Lisu Supplement
Phags-pa
Zanabazar Square
Mro
Old Italic
Phoenician
Carian
Lycian
Lydian
Gothic
Deseret
Shavian
Komi/Anbur/Old Permic
Elbasan
Osage
Pahawh Hmong
Toto
Old South Arabian
Old North Arabian
Adlam
Glagolitic
Glagolitic Extended
Old Turkic
Old Hungarian (Rovásírás)
Marchen
Buhid
Bamum
Kayah Li
Hatran
Yezidi
Caucasian Albanian
Miao
Masaram Gondi
Chorasmian
Osmanya
-
Hangul Jamo
(only modern Hangeul for now, I am desperate for feedback here!)
Hangul Syllables (discontinued)
Hangeul Compatibility Jamo (only modern Hangeul for now)
Katakana
Katakana Phonetic Extensions
Kana Supplement (only Katakana)
Kana Extended A (only Katakana)
Kana Extended B
Small Kana Extensions (only Katakana)
Bopomofo
Bopomofo Extended
Yijing Hexagram Symbols
Vertical Forms
Small Form Variants
Tai Xuan Jing Symbols
Counting Rod Numerals
Enclosed CJK Letters and Months (Only Jamo, Syllables, Latin Characters and months)
CJK Symbols and Punctuation (non-Han) (paused, incomplete)
-
Combining Diacritical Marks
Combining Diacritical Marks Supplement
Combining Diacritical Marks Extended
Combining Diacritical Marks for Symbols
Combining Half Marks
-
General Punctuation
Supplemental Punctuation
Alphabetic Presentation Forms
Emoticons
Miscellaneous Symbols (discontinued)
Miscellaneous Symbols and Pictographs (discontinued)
Supplemental Symbols and Pictographs (only face emojis)
Symbols and Pictographs extended A (only face emojis)
Ornamental Dingbats
Dingbats
Miscellaneous Technical
Currency Symbols
Letterlike Symbols
Arrows
Supplemental Arrows A
Supplemental Arrows B
Supplemental Arrows C
Miscellaneous Symbols and Arrows (non-astrological)
Block Elements
Box Drawings
Geometric Shapes
Geometric Shapes Extended
Superscripts and Subscripts
Enclosed Alphanumeric
Enclosed Alphanumeric Supplement
Control Pictures
Optical Character Recognition
Braille Patterns
Number Forms
Domino Tiles
Common Indic Number Forms
Mayan Numerals
Kaktovik Numerals
Musical Symbols (excl. Iranian, Kievan, and Gregorian notation)
Ancient Greek Musical Notation


=============

Planned in the future:
CJK Symbols and Punctuation?
Mathematical Operators?
Miscellaneous Mathematical Symbols-A?
Miscellaneous Mathematical Symbols-B?
Supplemental Mathematical Operators?
Warang Citi
Pau Cin Hau
Nyiakeng Puachue Hmong
Vithkuqi
Symbols for Legacy Computing
Halfwidth and Fullwidth Forms (Hangul)
Hangul Jamo (full)
Hangul compatibility Jamo (full)
Hangul Jamo Extended-A?
Hangul Jamo Extended-B?

My take on the Mongolian 'Phags-pa script designed by the Tibetan monk Phagspa in 1269, based on the Tibetan script, to write Mongolian, Tibetan, Sanskrit and Chinese. This font is based on the Tibetan style which consists almost entirely of straight lines and right angles. It seemed like a prime candidate for a FontStruct treatment. I've added rounded corners and serifs to make it more visually interesting.

The script is written in vertical columns top-to-bottom and left-to-right and thus needs to be rotated 90° clockwise and the columns then reversed.

'Phags-pa was added to the Unicode standard in version 5.0 in 2006. This font however uses an ad-hoc mapping to Ascii characters which admittedly doesn't always make sense. I kind of gave up in the end and started assigning a bunch of letters to digits. Letters are connected into syllable block by a thin line (mapped to '-'), usually on the right-hand side. A straight line clashed wth the serifs so I made it into a small arch.

The script is an abugida: the vowel ‹a› is inherent in each syllable and thus not written.