Link your Twitch account here: https://twitch.quantum-league.com/
Watch the stream for 1 hour and claim your Steam key on the Twitch drops inventory page within 24 hours: https://www.twitch.tv/drops/inventory
Your Steam key will appear here after you claim it: https://twitch.quantum-league.com/
Drop for the Steam key is on until the stream ends (between 2am and 5am CET).
Steam store page: https://store.steampowered.com/app/651150/Quantum_League/
The stream is here : Twitch