What is included in the Single Player DLC Pack (Mac App Store)?

The Single Player DLC Pack is a bundle pack that contains all previously released pieces of single-player DLC for Tomb Raider. The contents are listed below.

Challenge Tomb (single-player)

Outfits for Lara (single-player)

Skill Upgrades (single-player)

The skill upgrades can also be unlocked through gameplay without purchasing this DLC pack.