This page and the sub-pages for each mission contain spoilers regarding the single-player storyline. Individual mission pages linked below are extremely detailed, and include character dialogue, details of battles, tips and tricks, as well as other spoilers. You have been officially warned!
Freelancer's single player mode requires one to first complete the entire plot. Assuming you've been industrious while Juni and friends haven't been running your life, you should rise in level quickly following the completion of the story mode. If you've been steadily building your total net worth (exploring the outer systems of the Sirius Sector and finding Class 10 weapons in wrecks in the Edge Worlds helps), it is entirely possible to finish story mode and instantly level up to max level, allowing one to immediately purchase the best weapons and ships in the game... assuming one's reputation allows it!
Enter the Dragon!
Don't Forget Rheinland!
That's no moon...
...it's a Dyson Sphere!