Several games based on Cartoon Network shows have been removed with little notice. Mostly likely due to Warner Brothers.
OK K.O.! Let’s Play Heroes
https://store.steampowered.com/app/680700/OK_KO_Lets_Play_Heroes/
https://steamdb.info/app/680700/
Samurai Jack: Battle Through Time
https://store.steampowered.com/app/1150590/Samurai_Jack_Battle_Through_Time/
https://steamdb.info/app/1150590/
Steven Universe: Unleash the Light
https://store.steampowered.com/app/1379560/Steven_Universe_Unleash_the_Light/
https://steamdb.info/app/1379560/
Steven Universe: Save the Light
https://store.steampowered.com/app/821890/Steven_Universe_Save_the_Light/
https://steamdb.info/app/821890/
Adventure Time: Magic Man's Head Games
https://store.steampowered.com/app/412790/Adventure_Time_Magic_Mans_Head_Games/
https://steamdb.info/app/412790/
Finn and Jake's Epic Quest
https://store.steampowered.com/app/258590/Adventure_Time_Finn_and_Jakes_Epic_Quest/
https://steamdb.info/app/258590/
I managed to snag a key for Samurai Jack from a reseller site. And already owned OK K.O.! Let’s Play Heroes and Steven Universe: Save the Light.
Essay Pro