Biofuel

No storage limit, is uses almost for everything:

• building structures;
• researching of new technologies in the Research Center;
• producing of Weapons and Ammunition;
• hiring Partners and Helicopters at the Heliport;
• study enemies vulnerabilities at the Reconnaissance Center;
• upgrading all the Weapons at the Workshop etc.

The Sources of Biofuel are:

• your Home Base Reactor;
• Anomalies;
• 3rd day Daily bonuses award;
• Random Missions awards (1st-3rd terror level, intrusion);
• initial Supply Base.

Steel

Storage limit is determined by the Storage Depot level, uses for:

• researching of Assault Rifles and Shotguns in the Research Center;
• producing of Assault Rifles and Shotguns in the Arsenal;
• upgrading Assault Rifles and Shotguns in your Workshop;
• researching and producing  Cartridges for Assault Rifles and Shotguns;
• constructing of Buildings;
• producing of Frag, Acid and Incendiary Grenades;
• producing of Armor, etc.

The Sources of Steel are:

• Anomalies;
• two Iron Mines in Iron Mine and/or Relic locations;
• Random Missions awards (1st-3rd terror level, intrusion);
• initial Supply Base.

Magmatite

Storage limit is determined by the Storage Depot level, uses for:

• researching of Pistols and Machine Guns in the Research Center;
• producing of Pistols and Machine Guns in the Arsenal;
• upgrading of Pistols and Machine Guns in your Workshop;
• researching and producing Cartridges for Machine Guns;
• researching of Turrets;
• constructing of Buildings;
• producing of Medpacks etc.

The Sources of Magmatite are:

• Anomalies;
• two Magmatite Mines in Home Base and/or Hub locations;
• Random Missions awards (1st-3rd terror level, intrusion);
• initial Supply Base.

Data Disks

No storage limit, uses for:

• researching of new technologies in the Research Center;
• hacking different electronic devices (vaults’ locks, Dominator, Itinerant Merchant’s gadgets, etc.);
• study enemies vulnerabilities in the Reconnaissance Center;
• Play Mole mini game from Smuggler Rebecca;

The Sources of Data Disks are:

• Random Missions awards (1st and 4th terror level, occupation, intrusion);
• 2nd day Daily bonuses award;
• upgraded Supply Base.

Medals

No storage limit, uses for:

• upgrading all Weapons in the Workshop;
• training all Partners in the Training Range;
• producing missles at the Phoenix System;

The Sources of Medals are:

• Random Missions awards (2nd, 3rd and 4th terror level, occupation, intrusion);
• 6th day Daily bonuses award;
• upgraded Supply Base.

Skill Points

No storage limit, uses for:

• discover new Tactical, Strategic and Special technologies (including unlocking more powerful Turrets);
• study enemies vulnerabilities in the Reconnaissance Center;
• researching an exclusive Weapons in the Research Center;
• constructing an exclusive Weapons in the Arsenal;
• upgrading an exclusive Weapons in the Workshop.

The Sources of Skill Points are:

• completing the different tasks in Special Operations (including “after” walkthrough);
• weapons dismantle reward in the Workshop;
• 5th day Daily bonuses award;
• “hand made” defense during your Base Attacks (including Overlord) if you have the Combat Knife bonus.

Time Boosters

No storage limit, uses for acceleration of:

• producing of ammunition;
• researching new technologies;
• upgrading weapons;
• your hit-points recovery;
• waiting time to new random missions appear, etc.

The Sources of Time Boosters are:

• In pursuit of a spider-infestor mission award;
• 4th day Daily bonuses award;
• upgraded Embassy (combat bonuses for your friends’ victories).

1 = 1 real minute. If you don’t want to wait for 12 min. 34 sec., for example, you will need to spend 13.
If in short – time is money

Crystallite

Storage limit is determined by the Storage Depot level, uses for:

• upgrading some special Weapons in Workshop;
• Psi-strikes during battles;
• researching and producing of Cartridges for Machine Guns;
• researching and producing of Acid and Incendiary Grenades;
• researching and producing of U-3 Medpacks.

The Sources of Crystallite are:

• Anomalies (from the second level of Anomaly Decay technology);
• initial Embassy (gifts from your Facebook friends);
• Crystallite Mine in Crystallite Deposit location;
• awards for solving Random Encounters;
• upgraded Supply Base.

Gems

No storage limit, Uses for:

for purchasing different premium items in the game via Smuggler’s Offers (armor, weapons, partners etc.), Bonus Ammunition and etc. For more info look to the “Gems, gems, gems” article at the Tactics & Strategy section.

The free sources for Gems are:

• Random Missions awards (4th terror level, occupation, intrusion);
• Anomalies (with 5th level of Anomaly Decay technology);
• Dominator and Overlord (face to face kill) award;
• 7th day Daily bonuses award;
• winning the other player – Command Center Leader;
• Promo Codes from the Official Facebook Game Page. One Code will give you 100. New Codes are posted there on Thursdays at 16:00 GMT. Every Code is disposable, thus chance to get Gems is very slim.