Oxymous Prime
This game is a hybrid between a shoot'em up and a platform, he was developer with rpgmaker vx and released with freeware license. The story is composed by nine missions.
The player control Oxy, a famous bounty hunter. The current mission of Oxy is to save a rare bird kidnapped by the groulen poacher Borden. Borden is hidden in a groulen Mothership, Oxy must break into the ship and fight an army of robots and soldiers for complete his mission. After the third mission, the story moves into a unknown planet where Oxy must pursue Borden among dangerous creatures. The story mode has nine different missions.
You can see a video of game play HERE.
You can download the game via sourceforge HERE or you can download it via the developers site HERE