In Sigma Star Saga, humanity is struggling to survive against an onslaught by ruthless aliens.

Under constant attack, Allied Earth Federation intercepts a Krill communication that singles out six planets in the galaxy that the invaders have taken particular interest in. Sent in as a double agent, players must discover the mystery of the six planets and help defeat the Krill before time runs out for humanity.

By exploring the galaxy of Sigma Star Saga on foot, players can discover new parasitic Krill weaponry and gadgets in order to equip themselves and their spaceship. Additionally, players can collect up to 50 kinds of "Gun Data" and then combine them in simple combinations to create uniques weapon such as "Spread Shot+Heat Seek+Explode."

An action-packed space-shooter battle system ?€“ the first of its kind for an RPG

Customizable weapons with more than 50 different "Gun Data" items

A branching storyline with multiple endings