Crystals are the premium in-game currency. Crystals are used for completing builds, boosting titanium and energy production rates, rebuilding your army, and purchasing modules, artifacts, decor, additional drones, and additional starports.
Crystals are obtained by through daily rewards, completing missions, removing fallen garbage, completing achievements, reaching certain milestones during limited operations, purchasing by money, and removing forests.
Ways to obtain crystals for FREE:
- Getting high seasonal ranks(resets each month, you can check your rank in the profile). Depending on the rank at the end of the month, you get a certain amount of gems and modules. Galaxy General, the final rank, yields 1000 crystals, a legendary module, and VIP points.
- Removing forests and fallen garbage. Forests appear when you first start the game and don't regenerate. However garbage falls from the sky constantly. Each garbage contains 1-2 crystals in it.
- Reaching certain milestones in the operation. The operation yields 300 gems per week.
Spend your crystals wisely! At the start of the game you get 1400 gems, 400 from planet liberation and 1000 from VIP lvl 1(which doesn't take any purchases to reach)
Best setup is 1 starport, 1 hero pad, 2nd drone, and tech force zeta once antimatter is unlocked by winning a league round. Operation lets you reach further levels. As long as you don't waste crystals on stupid stuff like speeding up production, construction and training, you can get more cool stuff faster, like more drones, and starports. As of now, I have a lvl 5 HQ with two starports, 1 hero pad, and 3 drones(3rd drone looks like a mini acesco for some reason.)