Salvation Prophecy is a space epic. Four warring factions battle over control of the known galaxy. Space stations and planet colonies endure constant assault. You begin your journey as a soldier recruit. Through intense planet and space battle, your combat skills will be put to a grim test. Success is rewarded with powerful skills, combat gear, and ship upgrades, and you may rise in rank to become commander of your faction. Lurking in the dark recesses of the universe is a threat foreseen by an apocalyptic prophecy. A danger far greater than mankind's endless battles. The pursuit of the prophecy leads through distant alien worlds with deadly creatures and untold secrets. A chance for redemption, if only we find our way through that dark hour.
I've played through the game once, and I have to say it really exceeded my expectations. Although the game suffers a bit from repetition, I feel like it's really got a good tempo; let me explain what I mean by tempo. There's always something to do, and you're (until near the end) always getting stronger in some way. The best way I could describe it is to draw comparisons to Pirates!.
New mission types are introduced at a reasonable pace and keep the game interesting. Maybe you'll start out doing a planetary invasion, and when you get back "Quick! Scramble the fighters" because an enemy fleet has jumped in! Then after fighting off the invaders you get a mission to attack their space station. And then you take a moment to upgrade your skills. And then after that, you get a mission to explore a new wormhole. And when you get back, you decide to go bounty hunting. And then you decide to upgrade a few of your weapons. And so on.
There's always something to do. But the best part? You're never really FORCED (until near the end) to do any one particular thing. Don't like space missions? Tell your commander you're not interested, and then wait for a planetary invasion mission to come up.
Plus, there's lots of nice little details. When you walk around a base, you can see the soldiers wandering around, see colony and space station statistics on the monitors in the Mission Control room, and you can watch fighters actually scramble when invasion fleets are detected.
On the down side, the galaxy is fairly small and one space battle is much like another. The plot is mostly there to keep things moving along. Planets, although sometimes pretty (especially the first wormhole one), always feel rather empty.
Really, the TL;DR of it is that if you liked Pirates! and are a fan of sci-fi games then you'll definitely enjoy this solid game. Otherwise, you might be turned off by the repetition (especially by the time you reach commander) and the bare bones plot.