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The Winter Offensive Case Key is a utility item introduced in the December 2013 update. This key is used to open a Winter Offensive Weapon Case, and it features a cool silver design with a keychain attached in the shape of a frost-encrusted bomb.

This key is classified as an 'Industrial Grade' utility item. Although it's commonly available, its demand increases during the winter season.

The Winter Offensive Case Key was introduced as part of the Winter Offensive update in December 2013, together with 16 winter-themed weapon skins.

The key is popular, especially in winter, due to its associated case that offers a chance to unlock winter-themed skins, some of which are high in demand.

The Winter Offensive Case Key is specifically compatible with the Winter Offensive Weapon Case.

The key's unique feature is its winter-themed design and the ability to unlock the Winter Offensive Weapon Case.

The key was released during the Winter Offensive event, which introduced new maps and winter-themed skins.

The Winter Offensive Case Key, along with its associated case, was the first seasonal-themed case and key introduced in CS:GO.

The Winter Offensive Case Key is highly regarded as necessary for the unboxing tradition of the Winter Offensive Weapon Case among players.

It marked the beginning of a tradition where Valve introduced new themed cases for seasonal events.

The popularity stems from the demand for the seasonal Winter Offensive Weapon Case, which can be unlocked using this key.

The entirety of Winter Offensive event greatly influenced the key's popularity, as it was necessary to unlock the much-anticipated seasonal case.

The key itself does not have a direct use in esports, but it allows players to unlock weapon skins which are then used in competitions.

Many players eagerly anticipate the winter season to use the Winter Offensive Case Key and discover the gifts hidden in the Winter Offensive Weapon Case.