Unlike previous games in the series, In "Rise of the Tomb Raider" some outfits aren't purely cosmetic and add bonuses that can enhance your gameplay, which usually just makes things easier. All outfits can be used in Expeditions mode (bar the community-reward outfits) given that you have their respective card.

The outfits in the game are divided to four five categories, and each category of outfits is based on one general "look", with each having a different set of accessories and colors:

• Explorer
  
• Hunter
  
• Tactical
  
• Armor
  
• Classic - Available as of October 11th 2016.

Video courtesy of jackholiday on YouTube.

• Expedition Jacket - Available as you reach the first base camp in the Siberian Wilderness.
  
  
• Leather Jacket - Available as you reach the first base camp in the Siberian Wilderness.
  
  
• Gray Henley - Unlocked as part of story progression in the Soviet Installation.
  
  
• Remnant Jacket - Olive-green military jacket tied together to fit Lara, worn with brown trousers. Unlocked as part of story progression in the Soviet Installation.
  
• Desert Tank Top - Unlocked after completing the game.
  
  
• Battle Worn - While wearing this outfit, the delay before Lara regenerates her health is reduced. Reward for completing "Defensive Strategy" mission found in the Geothermal Valley.
  
  
• Pioneer - While wearing this outfit, Lara's melee damaged is increased. Available here as part of "Endurance Mode" pack.
  
  
• Valiant Explorer - While wearing the outfit all of Lara’s explosive arrows will have a bigger blast radius. Available here as part of "20 Year Celebration" pack.
  
• Blue Henley - Community reward for 2,000,000 tombs raided in the game world. Available in base camps since December 14th 2015.
  
  
• Whiteout Jacket - White winter jacket with mountain climbing gear, worn with brown trousers. Community reward for 100,000,000 collectibles found in the game world. Available in base camps since December 28th 2015.
  
• Dark Tank Top - A variation of "Desert Tank Top". Currently available through use of third-party tools.
  
• Rust Henley - A variation of "Gray Henley". Currently available through use of third-party tools.

• Huntress - While wearing this outfit, the delay before Lara regenerates her health is reduced. Reward for completing "A Hearty Meal" mission found in the Geothermal Valley.
  
  
• Sparrowhawk - Lara won't scare off wildlife as easily while wearing this outfit. Available here as part of "Sparrowhawk" pack.
  
  
• Apex Predator - Wearing this outfit reduces all damage inflicted by predatory animals. Available here as part of the "Apex Predator" pack.
  
  
• Spirit Weaver - Lara is given a chance to bandage her wounds without using resources while wearing this outfit. Available here as part of the "Remnant Resistance" pack.
  
  
• Wraithskin - Wearing this outfit increases the duration of poison arrow clouds. Reward for completing "Defeating the Witch" mission found in the Wicked Vale as part of "Baba Yaga - The Temple of the Witch".
  
  
• Nightshade - Lara has a chance of looting an exotic animal resource from a common animal while wearing this outfit. Available here as part of the "Wilderness Survivor" pack.
  

• Commando - While wearing this outfit, the delay before Lara regenerates her health is reduced. Purchasable for 50 Byzantine Coins in the supply shack found in the Soviet Installation.
  
  
• Infiltrator - While wearing this outfit, the delay before Lara regenerates her health is reduced. Reward for completing "Unlucky Ones" mission found in the Soviet Installation.
  
  
• Shadow Runner - While wearing this outfit, fired bullets and shells won't reduce the amount of available ammunition occasionally. Available as here part of the "Tactical Survivor" pack.
  
  
• Siberian Ranger - Lara's carrying capacity of special ammunition is increased while wearing this outfit. Available here as part of the "Siberian Ranger" pack.
  
  
• Ushanka - Camouflage military jacket with a black ushanka hat. Wearing this outfit reduces damage taken from melee attacks. Available here as part of "Cold Darkness Awakened". Unlocked after saving 15 prisoners.
  

• Sacra Umbra - While wearing this outfit, the delay before Lara regenerates her health is reduced. Reward for completing "Ancient Secrets" mission found in the Geothermal Valley.
  
  
• Hope's Bastion - While wearing this outfit, fired arrows will not be reduced from available ammunition occasionally. Available here as part of "Hope's Bastion" pack.
  
• Immortal Guardian - While wearing this outfit, damage from Greek Fire is reduced. Available here as part of the "Prophet's Legacy" pack.
  
  
• Ancient Vanguard - While wearing this outfit, the delay before Lara regenerates her health is reduced. Available here as part of the "Ancient Vanguard" pack.
  

All of the following outfits are included in the "20 Year Celebration" pack and are available here.

• Classic Tomb Raider II
  
• Classic Angel of Darkness
  
• Classic Tomb Raider II Bomber Jacket
  
• Classic Croft Manor
  
• Classic Chronicles Catsuit
  
• Reimagined Antarctica Outfit

I hope that this guide was helpful, feel free to comment and ask questions below.

Please note that I have listed some outfits that are currently only available on Xbox platforms, but it's only a matter of time until they will become available on the Steam store.