Gabe Newell’s Journey to the Savage page is already there. You cannot pre-order, and the price is unknown. As a reminder, the Epic Games service costs $10.99. Whether the Hot Garbage add-on will appear on the release of the game on Steam is unclear.
The Western press, in general, welcomed Journey to the Savage Planet warmly. The game is praised for its interesting world, good humor, and varied gameplay, which is overshadowed by complexity.