The standard edition of Dead Island 2 is also called the "Day One Edition" for physical copies (at least at launch), but they’re essentially the same thing. You’ll get the base game along with any eligible preorder bonuses.
It's worth noting that there are three different disc versions: PS5, PS4, and Xbox. Like many other game releases, the Xbox version comes with both the Series X and Xbox One editions. PlayStation is a bit more complicated. The PS4 disc also comes with the PS5 version, while the PS5 disc only works on PS5. Regardless of which platform you choose, the standard edition of Dead Island 2 costs $70.
As an alternative to the Day 1 edition, there's the Pulp edition. Weirdly enough, this edition also costs $70. The only difference here is that you also get the Pulp Weapons Pack (on top of the regular preorder bonuses).
The Pulp edition comes with the base game, any eligible preorder bonuses, and the Pulp Weapons Pack--which is filled with digital goodies. This version is only available in physical formats.
The Hell-A Edition is essentially the collector’s edition of Dead Island 2. It includes everything found in the Gold Edition, along with a steelbook case and collectible items. These collectibles include:
Venice Beach Travel Map
Six Slayer Tarot Cards
Two Pin Badges
Yes, that means you'll get two steelbook cases if you preorder this edition from Best Buy