Steam releases Playtest feature, allowing developers to invite players to test games

Valve first introduced Playtest as a beta last November, attracting over 1 million players across 161 games. The feature is now available for all developers on Steam, making it easier to run playtests with the help of the community.

Steam now has a playtesting feature

Early Access: Will It Help Or Hurt Your Game?

Steam Playtest (Steamworks Documentation)

Steam Playtest makes it much easier to beta test PC games

Haha : r/Steam

Creator Application

Steam releases Playtest feature, allowing developers to invite players to test games

PAYDAY 3 - Playtest is open to the public until Sep 11th! - PAYDAY 3 - PAYDAY 2 - TapTap

Steam Playtest Makes It Easier to Test New Games

Nightingale Team on Getting Early Access Right After Delay, Features, and Recent 7,000 Player Playtest