Add optional campaign overlay showing unlocks under each planet

[completesomething]

This would help in cases where you'd like hints on finding a specific planet/region for specific missions you'd like to go back to. For example, with the suggested overlay, it should be much easier to find the Kodachi Rally mission or the Terraforming mission.

[GoogleFrog]

Most options may as well not exist, for how much people notice them, so I wouldn't expect it to solve a problem. Perhaps add a small tooltip.

[sprunk]

Perhaps just enable the debug view that draws unlocks at planets by default? For noticeability, could have a fairly prominent button/checkbox right on the galaxy map (instead of in options) to shows extra info.

[completesomething]

Yes, I was thinking that it would be a checkbox on the galaxy map, not in the lobby menu settings.