Solo mode

Solo mode describes the full-length solo campaign of Space Pioneer, as well as the infinite mode unlocked upon completing the campaign. Though it has seen different version, this mode was the first one introduced in the game and is the lengthiest. In solo mode, the player takes the role of a pioneer tasked with the mission of securing a certain number of galaxies against the rampage of notorious alien mastermind Xeldar. To accomplish this goal, it will be necessary to land on, explore and secure a number of planets and take down Xeldar's lieutenants (referred to as "bosses"), before ultimately reaching the war boss himself and take him down.

Gameplay
The solo campaign is divided into short missions, which follow similar formats with a variety of objectives: typically, the pioneer will land on a planet with his guns and equipment, and have to shoot his way through a variety of hostile aliens to accomplish his objectives (collect resources, destroy alien nests, escort scientists, etc...). To navigate the planet, the pioneer can count on his radar giving him indication arrows to follow - although some secret objectives will require exploration without guidance. Objectives are divided into two categories, primaries which are mandatory and secondaries which grant bonus loot. Once all primary objectives have been accomplished, the pioneer must return to his landing beacon to take off the planet - thus marking the mission a success.

The different missions bring the pioneer to planets scattered between different galaxies, organized as "chapters". In each chapter, the pioneer will have to secure and accomplish a variety of objectives on the local planets to obtain stars. Once all planets have been explored and enough stars have been collected, the chapter boss can be faced in a massive confrontation on the planet's last chapter. Upon defeating the boss, the pioneer can they move on to the next galaxy. There are currently 11 chapters of increasing difficulty featured in the game culminating in a final showdown with Xeldar. Chapter 12 is a post-campaign procedurally generated endless mode (see below).

Story
''Primal Worlds: planets with high natural resource densities and environmental conditions suitable for human survival. Well, “suitable”’s a big word. Let’s just say the poor sods who get dragged there to establish mining stations probably won’t keel over on toxic gas or starve to death. Not on their first day at least. They might get munched on though.'' ''See that’s the thing with Primal Worlds: they hold a lot of water, food and all the good stuff. Stuff that’s good for all sorts of life. That includes alien scum. Overgrown bugs, giant man-eating plants, some sorta mutated bigfoot… Primal Worlds are freak shows. For people like me though, they’re more of a shooting gallery.''

''The mining industry big shots, they say aliens’ a “threat to the well-being of our staff” -- that’s corporate bull for “they make us bleed money”. So they created the Bounty Hunters to eliminate alien threats. Truth is though, Hunters are “accredited professionals”, a.k.a. slow and expensive. That’s where I come in.''

''People like me are the top of the best. Work alone, use the latest in alien-cleaning weaponry, able to exterminate entire species. And I often do. In the name of human progress, safety and profit, we secure entire worlds not for fame, but for the... how do they say again? Ah yeah, for the Greater Goodtm. They call us the Space Pioneers. Pioneering is what we do. It’s all good fun, really. Well it was, until Xeldar popped up. Now it's more of a blood bath. But hey, if it bleeds... right?''

- Space Pioneer Alpha

To be expanded

Use in meta-game
The solo mode is Space Pioneer's main mode, hence every player will play through at least the early parts of it. It also features most story elements of the game. When it comes to purely mechanical aspects, the solo mode is used for its loot, to acquire experience and coins by playing missions, and especially to unlock weapons by obtaining specific trophies, most of which are tied to specific planets or bosses from solo mode.

Endless mode
Upon completing the solo mode campaign, players will unlock the endless mode. As the name implies, in endless mode the player can play an infinite amount of new missions with random layouts and objectives. Unlike the campaign missions which feature specific elements in specific places, these endless mode missions will be completely different from a player to another.