Tomb Raider Cheats and Tips

For a way to get roughly 10,000 XP and 2,000 salvage every 5 minutes, head to the multiplayer menu and create a private match. Note that this method works alone too, you just have to do it in the multiplayer mode.
Choose the Rescue mode and the Beach map. Choose the Survivor team and go to customize loadouts. Once you are a high enough level, pick 'Second Wind' for your offensive skill. For the survival skill, you want 'Advanced Looting'. Next, exit the loadouts and choose Match Options. Set the time to as long as you like, bearing in mind it takes around 10 minutes to complete this method.
Set the "Medkits To Retrieve" option to "20", then start the
Match. Once in the game you need to go and get the medkits as quickly as you can. They appear randomly, but you will get to learn the most likely locations for them. Once you spawn in there will be a circle nearby where the medkits are dropped off. From there, a white waypoint icon will show you where the medkit is located. Run to each waypoint in turn and take them to the drop off point. Collect Salvage on your way (this respawns not long after it is collected). Keep doing this until the match ends. You can do this as much as you like!

For the easiest way to get the 'Boom Goes the Dynamite' Achievement, equip a Shotgun while you are going through Shantytown and get ambushed on a rooftop. The enemy will throw dynamite at you and all you have to do is shoot one of them out of the air.

To get this achievement, you have to speak to your friends on all seven of the possible occasions, and listen to everything they have to say.
Once the "X" symbol above a character's head is gone, you cannot talk to them any more. You will also notice the game auto-saving each time you exhaust all conversation options.
You can find a complete list of all the people that you need to talk to, and the correct times to talk to them, below:
1. Before you have to search for the 50 pieces of salvage, speak to Whitman.
2. Once you have the 50 pieces of salvage, talk to Whitman again. Make sure you do this before you repair the Axe.

3. Once you have helped Roth with the wolves, speak to him.

4. Once you get the Rope Arrows, you will soon after meet Roth again. Speak to him before you use the zipline.
5. Once you reach the shipwreck beach, you will be able to talk to Sam, Reyes, and Jonah.

6. Before you go to the Endurance to help Alex and get the tools, speak to Whitman, Sam, Jonah, and Reyes (on the boat) at the beach camp
7. After coming back from the Endurance, talk to Whitman, Reyes, and Jonah.

Check out the video below to see a compilation of the most brutal and painful Lara Croft death scenes in the game.
Watch the video

There are a total of 13 challenges that each require you to find collectables. In each challenge there are 4-10 collectables. When you have completed Story mode you will enter Free Roam mode where you will be able to complete ALL of the challenges. The game will save automatically whenever you pick up one of the collectibles and once the challenge has bee successfully completed you will recieve the corresponding Achievement.
Ghost Hunter Challenge Collectibles (All Totem Locations)
Shoot 10 totems.
Watch the video
#1 - 0:05
#2 - 0:22
#3 - 0:35
#4 - 0:48
#5 - 1:01
#6 - 1:15
#7 - 1:30
#8 - 1:45
#9 - 2:06
#10 - 2:20

Pyromaniac Challenge Collectibles (All Lantern Locations)
Shoot 5 lanterns
Watch the video
#1 - 0:05
#2 - 0:30
#3 - 0:52
#4 - 1:12
#5 - 1:31

Egg Poacher Challenge Collectibles (All Egg Locations)
Collect 5 eggs
Watch the video
#1 - 0:05
#2 - 0:23
#3 - 0:42
#4 - 1:00
#5 - 1:15

Illumination Challenge Collectibles (All Statue Locations)
Find 10 statues
Watch the video
#1 - 0:05
#2 - 0:26
#3 - 0:40
#4 - 1:00
#5 - 1:14
#6 - 1:34
#7 - 1:47
#8 - 2:04
#9 - 2:36
#10 - 2:54

Non-Believer Challenge Collectibles (All Banner Locations)
Burn 5 banners
Watch the video
#1 - 0:05
#2 - 0:22
#3 - 0:40
#4 - 0:56
#5 - 1:11

Laid to Rest Challenge Collectibles (All Effigy Locations)
Destroy 5 effigies
Watch the video
#1 - 0:05
#2 - 0:35
#3 - 0:56
#4 - 1:16
#5 - 1:33

Silencer Challenge Collectibles (All Alarm Locations)
Disable 4 alarms.
Watch the video
#1 - 0:05
#2 - 0:32
#3 - 0:49
#4 - 1:17

Firestarter Challenge Collectibles (All Sack Locations)
Burn 6 sacks
Watch the video
#1 - 0:05
#2 - 0:28
#3 - 0:56
#4 - 1:15
#5 - 1:31
#6 - 1:47

Red Cap Roundup Challenge Collectibles (All Mushroom Locations)
Collect 10 mushrooms
Watch the video
#1 - 0:05
#2 - 0:25
#3 - 0:42
#4 - 0:59
#5 - 1:12
#6 - 1:29
#7 - 1:44
#8 - 1:57
#9 - 2:12
#10 - 2:28

Mine Sweeper Challenge Collectibles (All Mine Locations)
Destroy 10 mines
Watch the video
#1 - 0:05
#2 - 0:22
#3 - 0:35
#4 - 0:48
#5 - 1:01
#6 - 1:15
#7 - 1:30
#8 - 1:45
#9 - 2:06
#10 - 2:20

Cairn Raider Challenge Collectibles (All Cairn Locations)
Find 5 cains
Watch the video
#1 - 0:05
#2 - 0:41
#3 - 1:02
#4 - 1:29
#5 - 1:55

Previous Inhabitants Chal..

Collect the following relics by going to the indicated coordinates and searching the area.
Coastal Forest
Oni Noh Mask:
Coordinates 53N 712367 UTM 3416125.
Hannya Mask:
Coordinates 53N 712351 UTM 3416086.
Female Noh Mask:
Coordinates 53N 712381 UTM 3416100.

Mountain Temple
Green Folded Fan:
Coordinates 53N 712435 UTM 3416145.
Gunbai War Fan:
Coordinates 53N 712434 UTM 3416147.

Mountain Village
USMC Dogtags:
Coordinates 53N 712456 UTM 3416141.
Dried Gobo Root:
Coordinates 53N 712462 UTM 3416166.
Old Photograph:
Coordinates 53N 712458 UTM 3416171.
Medicinal Herb Vial:
Coordinates 53N 712446 UTM 3416181.
Yagen:
Coordinates 53N 712468 UTM 3416195.
Old Photograph:
Coordinates 53N 712497 UTM 3416202.

Base Approach
Bronze Chinese Coin:
Coordinates 53N 712464 UTM 3416225.
Bronze Japanese Coin:
Coordinates 53N 712445 UTM 3416258.

Base Exterior
Japanese Dogtags:
Coordinates 53N 712395 UTM 3416281.
Marksmanship Badge:
Coordinates 53N 712382 UTM 3416295.

Shantytown
Metal Inro:
Coordinates 53N 712586 UTM 3416095.
Decorative Inro:
Coordinates 53N 712569 UTM 3416092.
Jade Horse:
Coordinates 53N 712591 UTM 3416080.
Commander's Inro:
Coordinates 53N 712582 UTM 3416036.
Scribe's Inro:
Coordinates 53N 71259 UTM 3416060.
Jade Drinking Vessel:
Coordinates 53N 712611 UTM 3416061.

Geothermal Caverns
Funeral Fan:
Coordinates 53N 712683 UTM 3416015.
Wedding Fan:
Coordinates 53N 712704 UTM 3416005.
Inscribed Silk Fan:
Coordinates 53N 712692 UTM 3416035.

Summit Forest
Chao Dynasty Dagger:
Coordinates 53N 712605 UTM 3415995.
Jade Ceremonial Dagger:
Coordinates 53N 712628 UTM 3415997.
Japanese Ceremonial Dagger:
Coordinates 712639 UTM 3415988.

Shipwreck Beach
Brown Jade Ink Box:
Coordinates 53N 712476 UTM 3415933.
Stuffed Bunny:
Coordinates 53N 712516 UTM 3415973.
Stained Jade Head Rest:
Coordinates 53N 712513 UTM 3415972.
Toy Train:
Coordinates 53N 712506 UTM 3415952.
Shaped Jade Head Rest:
Coordinates 53N 712524 UTM 3415962.
Worn Wallet:
Coordinates 53N 712526 UTM 3415964.

Cliffside Bunker
Portuguese Tin Coin:
Coordinates 53N 712558 UTM 3415925.
100 Mon Coin:
Coordinates 53N 712568 UTM 3415928.
Japanese 2 Sen Coin:
Coordinates 53N 712572 UTM 3415930.

Research Base
Chou Dynasty Helmet:
Coordinates 53N 712456 UTM 3416046.
Ceremonial Helmet:
Coordinates 53N 712441 UTM 3416048.

Chasm Shrine
Kansu Burial Urn:
Coordinates 53N 712595 UTM 3416265.
Ban Chiang Vase:
Coordinates 53N 712595 UTM 3416261.
Satsume Vase:
Coordinates 53N 712616 UTM 3416243.

There are 7 optional tombs that require you to complete little puzzles to open a treasure chest. Buying the Cartography (Tier III survival) skill will automatically unlock ALL the tomb entrances on the world map. The video below will show you the location of each of the optional tombs.
Watch the video
#1 - 0:05
#2 - 2:02
#3 - 4:25
#4 - 6:42
#5 - 9:41
#6 - 11:15
#7 - 13:20

There are 14 treasure maps altogether and they will unlock ALL the relic, gps and document locations on your world map. Buying the 'Cartography' (Tier III survival) skill will automatically unlock ALL treasure map locations on your in-game world map. The video below will show you the location of each of the treasure maps.
Watch the video
#1 - Coastal Forest - 0:05
#2 - Mountain Temple - 0:28
#3 - Mountain Village (Inside Tomb) - 0:54
#4 - Mountain Village (Inside Tomb) - 1:40
#5 - Base Exterior - 2:16
#6 - Shantytown (Inside Tomb) - 2:38
#7 - Shantytown (Inside Tomb) - 3:24
#8 - Geothermal Caverns - 4:15
#9 - Summit Forest (Inside Tomb) - 4:39
#10 - Shipwreck Beach (Inside Tomb) - 5:19
#11 - Shipwreck Beach (Inside Tomb) - 6:00
#12 - Cliffside Bunker - 6:45
#13 - Research Base - 7:05
#14 - Chasm Shrine - 7:29