Star Rage
http://www.gametop.com/download-free-games/star-rage/

Star Sword
http://www.gametop.com/download-free-games/star-sword/

Star Racing
http://www.gametop.com/download-free-games/star-racing/

Mother ships

Another possibility for loan: You can borrow from mafia (or bank, it is the same thing anyway) and in return they take your soul away (using Soul Extractor 2.0 - copyright of Mafia Inc.). You have 2 hours to repay them back. If you pay back loan + interest, all is OK. If you do not, you just die sin...

Some Ancients races possibly know how to use scripts to defend themselves against the player.

One of the races should have a device, which enables you to make a wormhole.

ships with metagenic/biological weapon

Sistem without gates - you would have to sell cargo and buy fuel, then breach the interstellar space to reach the next sistem with stargate

huge sun sistem with local stargates - when you go into one, you came out on the other side of the sistem

True. Ok, back to the drawing board, then ...Oh, the station could hide a stargate using a cloaking device. And only they would have a code for decloaking. So, if you destroy them, you still could not pass ...

No, if I do not pay, they can sell my family as slaves. Or they can take my liver in advance.

Or they can take my passport as a collateral. Or it would be be necessary to dock at the station before you leave Commonwealth space.

Possibilities are endless ...

When I dock at the station, I never tell them that I am a pilgrim.

I am talking small sums of money (if you are 500 kredit short of buying some good weapon).

Loan - A station could give you a loan if you need cash to buy some item. If you took a loan, you must do a mission for them or repay the loan + 2%. if you wont gave back a loan, the next time you dock at a station, your cargo is taken away. If your cargo is not valued enough to repay all the debt, ...

stealers- enemies who wouldn't want to destroy you, but only want to take out your shields so they can teleport your cargo to their ship. When heavily damaged, ship would automaticly stop. All energy from the engine would go to shields and you could have a 2,3 seconds more to defend yourself. Sun si...

Another Collector quest: Collect special items through the galaxy and at the end (or near the end) you could unlock a sun sistem with some special quest.

When you reach some milestone like stargate number 10 and if you want to go back, you should get a list of previous stargates. when you click on one, you would be teleported to that sistem. This would be good if you couldn't defeat mightier enemy, so you just go forward, equip with mightier weapons ...