Converting your gems to credits is an important thing to know! This can really help you in games! You can buy some really powerful projectiles, drones, and mines! These secondary weapons can really boost your game level!
On the projectiles list: Rockets, Missiles and Torpedoes. The least powerful, Rockets, only does about fifty damage, but is quite useful in ships where bullet regen is a problem. They cost 100 gems, as they don't give much damage. Missiles give around 250 damage. very powerful in survival, but not as useful in U-Series and Nautic Series. These powerful missiles can be used in battle for extra help or last defenses. Torpedoes, probably the most powerful secondary weapon, deals 500 damage! Even though it deals so much damage, this weapon almost always misses! This weapon is also unbelievably slow. It would be the most effective against teir 7s. Not very efficient in battles with lower tiers.
Pods: Mining Pods, Defense Pods, Attack Pods. Mining Pods are meant to help you mine. They can shoot asteroids, but don't cause any damage to other players. Not very useful in Alien Intrusion, I suppose! Defense Pods are quite useful if you have a lot of them. They are meant to defend you from other players. They can take a lot of damage, but they have limited range. They won't know someone is there if they aren't close enough. It's hard to describe how far because there are no measurements in this game. I would say about 3 full size asteroids is the range of the defense pods. Attack pods, in my opinion, are the most useful and best pods. However, I only think that because most of the time, I am an anti-teamer. People who like to make teams in survival usually don't get attack pods. But when you are in a battle, these are quite effective. They serve an unbelievable difference. The amount of firepower in just 1 attack pod is enough to give you a lift in a battle against someone in the same ship as you.
Finally, Mines: Space Mines and Heavy Mines. Space Mines give a small amount of damage, but they do have some blowback. Most players only use these when they are running away or retreating. Not really used for attacking, though, sometimes, if someone is really skilled with it, it can be a deadly weapon. Heavy Mines are, in my opinion, the deadliest and most powerful Secondary Weapon. The Heavy Mine is suitable for all types of battle and against any ship. Pretty sure they do around 250-500 damage. Even though Space Mines are powerful, Heavy Mines make Space Mines look like balloons. Heavy Mines are used in so many ways. You can defend yourself with them, take them with you when you are attacking, and even trick people with them!