Players of Halo: Campaign Evolved can now locate all hidden skull collectibles across the game's campaign missions to unlock unique gameplay modifiers [1], [2].
These collectibles are central to the experience for completionists and those seeking to alter the game's difficulty or mechanics. Finding these items also contributes to overall achievement progress [3].
The campaign consists of 13 missions, which include 10 classic levels and three bonus prologue missions [1]. According to guides, there are three skulls hidden in each of these missions [3].
In total, 39 skulls can be found manually by exploring the environments [1]. An additional three skulls are unlocked automatically after a player finds three total collectibles, bringing the overall number of available skulls to 42 [1]. Some sources describe this as over 40 different collectible skulls [3].
Certain collectibles are noted for being particularly difficult to find. A Polygon author said there are three skulls and one terminal in the second mission, "Halo," and noted that one of them is in a very tricky place to reach.
Other locations require specific backtracking. A GameSpot author said that after receiving a Magnum on the ship's deck, players should turn around and head back toward Keyes to find a skull underneath two pilot seats at the front of the ship.
These modifiers change the fundamental rules of combat and exploration, providing a way for players to customize their experience after completing the standard story.
“There are three skulls and one terminal to find in "Halo," the second mission in Halo: Campaign Evolved”
The inclusion of these collectibles in the remake maintains the legacy of the original series' secret-hunting mechanics. By tying these modifiers to exploration, the developers encourage players to engage with the environment more deeply than a standard playthrough requires, extending the game's longevity through achievement hunting and high-difficulty custom runs.
