Held by Airwiggles.com
Every day through the month of April they posted clips from different indie videogames/animations to sound design with different challenges (like, making sound design with synths only or using only sounds provided)
You can see all sound designs I made here (Each of them was made in a less than a single day):
Sound re-design for game "Fade" by "Knight by Night"
Sound re-design for game "CyberRush" by Dream Engine
Sound re-design for animation "Helen" by @charpu_art
Sound re-design for game "Gravia" by Dan Goyette
Sound re-design for motion design by @evancookseymotion
Sound re-design for game "Artificial" by Ondrej Angelovič
Additional challenge was to use only provided sounds
Sound re-design for game "Bladesong" by Sun and Serpent
Sound re-design for game "Necrowave"
Sound re-design for animation "A fly" by @madmoon_
Additional challenge to use only mouth sounds
Sound re-design for game "Dungeon Slime Hero" by Lost In Time Games
Sound re-design for game "Plunder: Scourge of the Sea"
Sound re-design for game "Battle Shapers"
Sound re-design for UI animation by Briac.aep
Additional challenge was to use only synthesized sounds
Sound re-design for game "Hop'n'Morty"
Sound re-design for game "Baphomet"
Sound re-design for game "Hacker Raccoon"
Sound re-design for game "Inkshade"
Sound re-design for game "Chronomancer"
Sound re-design for game "The Universal"
Sound re-design for game "Among Ashes"
Additional challenge was to use only provided sounds
Sound re-design for game "Trench Tales"
Sound re-design for game "Stunt Paradise"
Sound re-design for game "Edge of Allegoria"
Sound re-design for game "Barricade"
Sound re-design for game "Grippy Golf"
Sound re-design for game "Gennady"
Sound re-design for game "Cozy Crest"
Sound re-design for animation "A Soul Stuck in Limbo" by @shkezi
Sound re-design for game "Trailbazers"
Sound re-design for game "Unreal Physics"