Alongside the highly anticipated re-release ofHalo 3on PC, fans of the game were also gifted a new skull to unlock.The Acrophobia skullallows players to fly around the game’s many maps unrestricted by simply holding the jump button. This has understandably been a fan favorite addition, but it seems it is going away soon.

For those that don’t know,Halo 3features a variety of skulls which modify the gameplay in some way. Many of these skulls are simply fun cosmetic changes like making grunts explode into confetti when the player gets a headshot on them, but others affect the gameplay, making it easier or harder.

Acrophobia Halo 3 Skull

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The Acrophobia skull definitely makes things easier, and it has allowed players toseeHalo 3from a whole new perspective. What’s more, after the skull is unlocked, it can be used in any of the games from theMaster Chief Collection, allowing for greater exploration inHaloandHalo 2as well.

Unfortunately, it has been revealed that the Acrophobia skull is going away soon, but fans that unlock it before the deadline will get to keep it forever. By the end of the day on July 29th, players will no longer be able toacquire the Acrophobia skull, so interested players will need to get to work now to obtain the skull if they haven’t yet. It is unclear at the moment whether or not the skull will ever make a return later for players that may have missed the opportunity at launch, but it’s best not to risk it.

Unlocking the skull isn’t easy, but there is a trick to make things quicker. Players will need to kill 343 flying enemies in the campaign ofHalo 3, and they must be playing on Normal or harder. The best place to get this achievement is during The Storm mission, as it features a ton ofBuggers(Halo3’sflyingbug-like enemies). At one point a dropship releases a swarm of them, so the player should dispatch them and then reload the checkpoint. Rinse and repeat this a few times and the skull can be unlocked relatively quickly.

Acrophobia is an interesting addition toHalo 3as it lets the players really break the game. This isn’t necessarily a bad thing since most of its players have probably already played throughHalo 3at one point or another, but it definitely allows for some creative strategies tobeatHalo 3’s most difficult levels.

Halo 3is available now for PC, Xbox One, and Xbox 360.