Humble Bundle's D&D Classic Collection 2026 Bundle is mostly stuff I have on GOG. I'm not sure if this is a Steam bundle or not.

New to me:

DeathKeep ($3)
DragonStrike ($3)
Fantasy Empires ($5)
Silver Box Classics ($5)
Spelljammer: Pirates of Realmspace ($5)

Stuff I already own:

Al-Qadim: The Genie's Curse
Dark Sun Series
Demon Stone
Dragonshard
Forgotten Realms Archives v1 to 3
Krynn Series
Ravenloft Series
Stronghold: Kingdom Simulator
Temple of Elemental Evil (this bundle includes it as a 33% off coupon)

So $12 for $18 I don't own is probably not worth it. I can wait for the 2027 bundle.