Great price for this edition of ARK: Survival Evolved that contains 3 DLCs and the base game.
The normal edition is also on sale for $19.48.
From the website:
Combining the base game with 3 massive Expansion Packs, 'ARK: Survival Evolved Explorer's Edition' is a ultimate way to get even more dinosaur action! The 'Explorer's Edition' gives you access to the mega hit 'ARK: Survival Evolved' as well as the 'Scorched Earth' (available now), 'Aberration' (available now), and 'Extinction' (coming in 2018) Expansion Packs, adding nearly 900 hours of gameplay!