I am just now realising this is just PC games lmao.
Well if you want PC specifically just grab these songs as they are all games on PC (naturally excludes Nintendo as they don't put their games on PC.)
I'll also add in a few extras not in the original list:
-Stellar Light (Eschatos)
-Violent Moon (Illumination Laser)
-Dive Deeper Still (Graze Counter GM)
-Aerolith Aurorablast (Blue Revolver)
-Exit 133 - Hagane Remix (Blue Revolver: Double Action)
-Cascadian Cannabis Conundrum - Exemia Remix (Blue Revolver: Double Action)
-2008 AD, Tokyo (Dodonpachi Resurrection)
-Explorers (Black Bird)
-Akira (Grounseed)
-Dual Moon (Metal Black)
-Illusory Science (Seihou Shuusou Gyoku)
-Shop Demo (Grounseed)
-Smog Sewers (Spark the Electric Jester)
-Lunar Bass (Spark the Electric Jester)
-Frozen Capital of Eternity (Touhou LOLK)
-Ivory Towers (Iconoclasts)
-Scattered and Lost (Celeste)
-Brain/Search I (Desire)
-Reflector (Desire)
-End of Daylight (Touhou SoEW)
-Step U/B (Uwabami Breakers)
-Doll Maker of Bucuresti (Touhou PCB)
-Moon Fight (Castlevania X68000)
-Flower of Japan (Seihou Kioh Gyoku)
-A Phantom's Boisterous Dance (Touhou SoEW)
-Ballad of the Burning Squirrel (Super Meat Boy)
-Rocket Rider (Super Meat Boy)
-Main Theme (Xenon)
-The Witches Ball (Seihou Shuusou Gyoku)
-Strongest Foe (Ys 3 X68000)
-Dark Road~Road of the Apotropaic God (Touhou MoF)
-It Ends With a Whimper (Super Meat Boy)
-Dream Land (Touhou LLS)
-Higher the Air (Mega Man X7)
-Desire Drive (Touhou TD)
-Meadow's Edge 1-3 (Apidya)
-The Pond 1-3 (Apidya)
-Sewer Blast 1-3 (Apidya)
-Ice Brain (Mega Man Zero 2)
-Lunate Elf (Touhou EoSD)
-Menu (Disposable Hero)
-Shut it Up! (Aquales)
-Reborn Mechanics (Mega Man Zero 3)
-Deep Blue (Mega Man Zero 4)
-The Fire is Gone (Ultrakill)
-Requiem (Ultrakill)
-Ruins (Undertale)
That includes Irisu Syndrome as that is a PC only freeware game currently on the archive
Adding even more:
-Network Space (Mega Man Battle Network 5)
-Doubt (Metal Black)
-Vertigo (Dodonpachi Resurrection)
-Infinity (Cho Ren Sha)
-Orange Type L (Illumination Laser)
-Rabi Rabi Beach (Rabi Ribi)
-Sunset Heights (Spark the Electric Jester)
-No Remorse (Rabi Ribi)
-Carnival Night Act 2 (Sonic 3 Prototype/Origins)
-Stardust Speedway Present US (Sonic CD)
-Special Stage JP (Sonic CD)
-Special Stage US (Sonic CD)
-Sabu's Mansion/Fancy Fight (River City Zero & Girls respectively)
-Wonder Panorama (Mega Man ZX)
-Wire Sponge (Mega Man X2)
-Welcome to Valhalla Remix (eXceed 2nd Vampire Rex)
-Beyond the Deep Blue Sea (Final Fantasy V)
-Wish (Mime)
-Vs Caviar (Metal and Lace 2)
-Different World I (YU-NO)
-Tracer (Briganty)
-Enigma of Aqua (Mega Man Unlimited)
-Plague Man (Mega Man Rock Force)
-Charade Man - 2014 (Mega Man Rock Force)
-Helium Havoc (Noitu Love)
-The Frozen Swords Dance Madly in the Snow (Azure Striker Gunvolt 2)
-Frozen Sword and Madly Blooming Snow (Azure Striker Gunvolt 2)
-Envious Necromancer (Azure Striker Gunvolt)
-The Bewitching City (Azure Striker Gunvolt)
-Waste Days (Metal Black)
-Visionnerz (Darius Gaiden)
-As The Earth Fades Away (Azure Striker Gunvolt)
-Outlaw's Lullaby/Lullaby of Outlaws (Yakuza 2, Yakuza Kiwami 2, Yakuza Like a Dragon)
-Deep in Space (Mega Man 10)
-Speed Star (Yakuza 4)
-Aqua Lake Zone (Sonic 2 Game Gear)
-Sunset Park Zone Act 1 (Sonic Triple Trouble)
-Sunset Park Act 2 (Sonic Triple Trouble 16 Bit)
-Tidal Plant Zone Act 1 (Sonic Triple Trouble 16 Bit)
-Tidal Plant Zone Act 2 (Sonic Triple Trouble 16 Bit)
-Aqua Planet Zone both GG and SMS (Sonic Chaos)
-Gigapolis Zone (Sonic Chaos Game Gear)
-Level Editor C (Mega Man Maker)
-Out in the Cold (Mega Man Revolution)
-Trash Man Stage (Mega Man Super Fighting Robot)
-Cirno Stage (MegaMari)
-Dollhouse (Koumajou Densetsu: Scarlet Symphony)
-Grave Cave (Koumajou Densetsu II: Stranger's Requiem)
-Opening Stage (Mega Man 8)
-Stage Select (Mega Man 8)
-US Opening/Metal Heroes (Mega Man 8)
-US Ending (Mega Man 8)
-Man on a Mission (Mega Man Arena)
-Jet Man (Rokko Chan)
-Port Man Stage (Mega Man Rock Force)
-Tide Man (Mega Man Rock & Roll)
-Cyclical Rampage (Mega Man Unlimited)
-Chilly Wolf (Mega Man X: Innocent Impulse)
-Magus Night (Touhou HM)
-Love Colored Magic (Touhou Hisoutensoku)
-Moon, Piano and Veritable Pandemonium (Koumajou Densetsu: Scarlet Symphony)
-Glacial Galaxy Zone (Sonic Axiom)
-Calcified Cavern (Sonic Axiom Beta)
-Machine Mayhem Zone (Sonic Axiom)
-Serious Influence for Redhot Ride Act 1 (Sonic After the Sequel)
-Tea With Ellie, Flight Thrills, and Espresso with Bayonetta for Cyan City (Sonic After The Sequel)
-Combat Night for Parhelion Peak Act 1 (Sonic After the Sequel)
-Neon Paradise for Parhelion Peak Act 2 (Sonic After the Sequel)
-Radiance for Foliage Furnace Boss (Sonic After the Sequel)
-Evening Dreamscape pt 1 and 2 for Sunset Star Act 1 and 3 (Sonic Before the Sequel)
-Stellar Lights for Technology Tree Act 2 (Sonic After the Sequel)
-Wolf Rayet for Technology Tree Boss (Sonic After the Sequel)
-Ghosts with Guitars for Moon Mansion Act 2 (Sonic After the Sequel)
-Red Moon for Storm Station Act 3 (Sonic After the Sequel)
-Stratospheric Synergy for Arcane Altitude Act 1 (Sonic Before the Sequel)
-Aquarium Park Act 2 (Sonic Colors Ultimate)
-Tuxedo Knight (Gundemonium Recollection)
-Oriental Flower (Blazblue Calamity Trigger)
-Catus Carnival (Blazblue Calamity Trigger)
-Science Fiction (Blazblue Continuum Shift)
-Queen of Rose (Blazblue Calamity Trigger)
-Relentless Force (Bullet Soul)
-Night Walker (Under Night in Birth)
-Green Earth (Neptunia MK 2)