XCOM 2 Cheat Codes & Walkthroughs for PC 

Use a text editor to edit the indicated file in the directory:
"Program Files (x86)\Steam\steamapps\common\XCOM 2\XComGame\Config".
Edit the listed parameter in that file as desired.

Increase squad size:
Edit file: DefaultGameData.ini
Parameter to edit: MaxSoldiersOnMission

Low HP enemies:
Edit file: DefaultGameData_CharacterStats.ini
Parameter to edit: CharacterBaseStats[eStat_HP]


Magnetic Rifle dam:
Edit file: DefaultGameData_WeaponData.ini
Parameter to edit: AssaultRifle_Magnetic_BaseDamage

Grenade expl.:
Edit file: DefaultGameData_WeaponData.ini
Parameter to edit: FragGrenade_Radius

Clothes and beard:
Edit file: DefaultNameList.ini
Parameter to edit: NewSoldier_HatChance

Mov. speed carrying:
Edit file: DefaultGameCore.ini
Parameter to edit: CARRY_UNIT_MOBILITY_ADJUST

Better Shadowstrike:
Edit file: DefaultGameData_SoldierSkills.ini
Parameter to edit: SHADOWSTRIKE_CRIT

Better Conceal:
Edit file: DefaultGameData_SoldierSkills.ini
Parameter to edit: STEALTH_CHARGES

Powerful weapon att:
Edit file: DefaultGameCore.ini
Parameter to edit: FREE_KILL_BSC or FREE_RELOADS_BSC

Less enemies:
Edit file: DefaultMissions.ini
Parameter to edit: MaxSpawnCount


Heroes:
Customize a soldier and change his name to one of the following
entries to unlock the corresponding character.
Note: This will prevent achievements or trophies from being earned.

Sid Meier - Sid Meier (Psi Operative Magnus)
Peter Van Hoorn - Peter Van Hoorn (Assault Build Ranger Colonel)
Beaglerush (nickname) - Beaglerush (Grenadier)


Console cheats:
In order to input the cheats, you must activate the console command.
you need to do next steps:
- Right Click you Game and Select Properties
- Click on the 'Set Launch Options' Tab
- Types this in the textbox: -allowconsole
- Press ok and Start the Game

Once You Load you game Press [^] or [~] to bring down the Console
Enter One of the Following Cheats and Press Enter to Activate the Cheat.

Note: XX = Number you need to Enter(For eg. giveresource EleriumCore 10000)

Cheats For Items:
giveresource EleriumCore XX
giveresource CorpseSectoid XX
giveresource CorpseAdventTrooper XX
giveresource CorpseAdventOfficer XX
giveresource CorpseAdventStunLancer XX
giveresource CorpseAdventShieldbearer XX
giveresource CorpseFaceless XX
giveresource CorpseViper XX
giveresource CorpseBerserker XX
giveresource CorpseMuton XX
giveresource CorpseAdventMEC XX
giveresource CorpseArchon XX

Cheats For Resources
giveresource supplies XX
giveresource AlienAlloy XX
giveresource EleriumDust XX
giveresource Intel XX
giveengineer 1
givescientist 1
GiveFacility OTS
GiveFacility Foundry
GiveFacility PsiLabs
GiveFacility EleriumGenerator

Cheats For Strategy:
PowerUp - Makes All units invincible, unlimited ammo
TakeNoDamage - Bypass any SetHitPoint calls, rendering all units invincible
PsiLevel (n) - (n= 0,1 and 2)
SetStratagyFacilitiesFree [on, off] - makes facility builds free
SetStratagyFacilitiesInstantBuild [on, off] - instant facility build
SetStrategyFacilitiesUnlockAll [on, off] - allow player to build all facilities
SetStratagyFacilitiesSuperSpree [on, off] - build all facilities from the start
free, insta build


Advance with Caution:
When you come out of concealment, do it carefully. Running ahead is risky,
since you could trigger an enemy encounter halfway through a turn, when
you're not prepared. Keep a single character at the front of the group (the
Ranger works best), and let the others tag behind by at least a square or
two. Why take unnecessary risks when it's so easy to play things safe?


The Advanced Warfare Chamber Is Terrific:
Are you having trouble deciding what facility to go for next? Make it the
Advanced Warfare Chamber, which has a whole host of benefits. It nearly
halves the time you'll have to wait for soldiers to heal, for starters,
and there's also the chance it will grant them additional skills when they
level up (from other character classes). That can work out in a number of
ways, and there's a really good chance it will work in your favor. Try to
get that facility early in your campaign to maximize its impact.


1080p and Higher Display:
* Go to C:\Users\???\Documents\My Games\XCOM2\XComGame\Config
* Backup this file before making any changes
* Open the XComEngine
* Search and Change the ResX and ResY to your desired Resolution.
* Save and Run the Game. Enjoy. Note: Do not make any changes
in-game Settings unless you want to revert back.


Save Game Location:
Please note that in XCOM 2, saves are not in the normal XCOM: EU place.
You will discover all you saves in the directory
"\Documents\My Games\XCOM2\XComGame\SaveData" i.e.
it's not just "\games" but "MY GAMES".