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Halo: Campaign Evolved

Microtransactions in Halo: Campaign Evolved are summarized as...

The game offers a Premium Edition for an additional 20 USD over the base game of 60 USD, for a total of 80 USD. This grants access to a set of 5 character skins and 6 weapon skins. These are cosmetic only. Additionally it grants access to a digital art book, a digital short story, and a digital game manual. None of these items are available outside of the Premium Edition.

Pre-purchasing the Premium Edition would grant up to 5 days of early access to the game.

Pre-purchasing the game in any edition would grant access to a set of cosmetic items, 2 weapon skins and 2 character skins.

👎
You can (or could) gain early-access to the game by spending more money.
Features unique cosmetic rewards for pre-ordering the game.
Has a "deluxe" edition of the game which features (almost) nothing but in-game cosmetic items.
👍
There are no additional purchases other than a "deluxe" version of the game. No microtransactions, no DLC.