There is a cap / max on all resources: 15,000 for metal and oil, 500 for energy, 1000 for workers. The cap on metal and oil can be increased to 30,000 if you become a supporter and buy the increased storage boost.
Crystals & Relics aren't normally classed as resources. For more details, see Relics, Crystals, Wreckages and Garrisons.
Metal / (Gold - Fantasy) / (Minerals - Galaxy)
Metal is also known as Gold on fantasy worlds, and Minerals on galaxy worlds
- Metal is used for building:
- Metal is produced by structures, taxation, and workers.
- You can also trade metal with alliance members.
- Metal can be salvaged after a battle.
- You can only store 15,000 metal; when you reach this amount you will not produce over this limit, this includes production from crystals, relics, conquers and resource outposts. This cap may be increased by purchasing the Big Storage upgrade in the boosts window.
- Metal is the most important resource in the beginning of a new colony but is needed at all points of the game.
Oil / (Lumber - Fantasy) / (Gas - Galaxy)
Oil is also known as Lumber on fantasy worlds, and Gas on galaxy worlds
- Oil is used for building:
- Oil is produced by structures, taxation, and workers.
- You can also trade oil among alliance members.
- You can only store 15,000 oil, once you hit this limit you will stop producing oil, this includes production from crystals, relics, conquers and resource outposts. This cap can be increased by initiating the Big Storage boost.
- Oil isn't used as much in the beginning but is still needed in smaller quantities than metal for building. Once you get a larger army built Oil becomes VERY hard to maintain as you are flying your units around.
Energy / (Mana - Fantasy)
Energy is also known as mana on fantasy worlds.
- Energy is used for various technology based applications.
- Once you have built the required structures, energy can be used for:
- Energy can only be produced by your structures.
- A maximum of up to 500 Energy can be stored at one time.
- Workers are used for training military units and building outposts.
- Workers also affect how much metal and oil you produce each tick.
- The more workers a colony has, the more resources that colony will get & the larger the colony will appear.
- Workers can be killed by someone successfully using the spy action "Poison Water Supply".
- Your colony being hit by a missile or dragon will reduce the amount of workers in your colony by 10%.
- A maximum of up to 1000 workers can be stored at one time.
Resource Production Table
The table above shows your metal, oil, energy and worker income. Metal and Oil is broken into:
- Facilities - The base amount of resources gained from your resource structure.
- Workers - The amount produced by your workers (effected by the efficiency of the corresponding resource structure)
- Bonuses - The amount of additional resources gained from Relics & Crystals and resource outposts.
- Taxation - The amount of resources collected from taxation
Energy is produced at a flat rate equal to the level of your energy structure (1 per level)
Workers are broken into:
- Base Growth - A flat rate of 40 workers which every colony gains.
- Food Facilities - A bonus to worker production that you gain from your food structure.
- Crystals - For every 25 crystals you own, you gain an additional worker production.
- Conquers - For each conquer you control, you gain an additional worker production.
- Worker Upkeep - For every 25 population, your worker production is reduced by 1.
- Army Upkeep - For every 30 soldiers (workers) in your army, your worker production is reduced by 1.
- Outpost Upkeep - For every 2 outposts, your worker production is reduced by 1.
- Missile Upkeep - For every nuke you control, your worker production is reduced by 1.
Note: You gain your worker production's worth of workers every 24 ticks