List of the cassette names (Not always the exact name of the song,
some of those are kinda placeholders cause I didn't find the english name):

aLIEz
A Cruel Angel's Thesis
Accidentally In Love
Africa
Ageage Again
All Falls Down
Another Colony
As You Like It
Assassination Classroom 1
Assassination Classroom 2
Awoken
Bad Guy
Barbie Girl
Blend W
Bloody Stream
Blumenkranz
Boom Boom Boom Boom
Breathless
Bromance
Burnout Syndrome
Butterfly
Caramelldansen
Cartoon Heroes
Chika Dance
Chu Chu Lovely Muni Mura
Crazy Noisy Bizarre Town
Crossing Field
Daddy Daddy Do
Dearest Drop
Deco 27
Deja Vu
Divine Intervention
Dororo
Down Under
Easy Love
Eternal Horizons
Exec Cosmoflips
Eyecatch Too Much
Fall In Love
Fantastic Dreamer
Fireflies
Flumpool
Forget Me Not
Fubuki
Kukkireta [Starts with an F not a K but gets censored by steam]
Gamers
Gas Gas Gas
Get Down
Gimme Chocolate
Girlfriend
Good Morning World
Gravity Wall
Great Days
Guns & Roses
HB
Hai Yo
Hand in Hand
Haruka Kanata
Hello My World
Hello Shooting Star
I Burn
I Miss You
I'm A Hex Girl
Inferno
Interspecies Reviewers
Its A Good Day To Die
Karate
Kimi No Sei
Kimi ga Yume wo Tsuretekita
Kimi to Mita Hana
Kira Monster
Knock Me Off My Feet
Kobayashi
Komm Susser Tod
Koukai no Uta
Koukotsu Labyrinth
Kuusou Mesorogiwi
Lagtrain
Last Christmas
Lemrina Theme
Living Idly And Dying As If Dreaming
Lost One's Weeping
Mechanica
Miku
Monsters
Motor City
Nanbaka
Neon Pegasus
Night Of Fire
Nippon Egao Hyakkei
Omega Rhythm
Onii-Chan Baka Hentai
Oops I Did It Again
Ore Twintails Ni Narimasu
Peace Sign
Perfect Oblivion
Pink Fluffy Unicorns Dancing on Rainbows
PonPonPon
Ram Wire
Re Creators OP 2
Real To Me
Renai Circulation
Reol+nqrse
Romeo and Cinderella
Running in The 90s
Sakura Ikimono Gakari
Sentimental Crisis
Shanti Shanti Shanti
She's Out of Her Mind
Shiny Happy Days
Silhouette
Soaring Sky
Sono Chi No Sadame
Space Globglogabgalabbity
Stand Proud
Step
Stereo Future
Stressed Glob
Styx Helix
Summer Of '69
Supreme
Take Me Home Country Roads
Tank
Tell Me Why
The 7th Element
This Game
Tiny Light
Titanium
Toradora
Triple Baka
Twintail Dreamer
Viewtiful Days
Wavin' flag
Wonderful Wonder World
World Is Mine
You Are My Friend
Your Voice
Yuki no Shizuku Ame no Oto
Yume no Tsuzuki
2004 Breakup