SpacePirates is a free German space opera RPG. It is set in the 40th century. Humanity and several other alien races inhabit space, competing with each other Sometimes peacefully, sometimes not. Several threats lurk in space like the space pirates and the space amazons. The player characters are part of those threats, as they are a crew of those space pirates.
A character is defined by four profiles: Pilot, Merchant, Tech, and Mercenary. Each profile is assigned a number of dice during character creation. Each profile must at least have one die. Alien races get a bonus die in one of the profiles. Each profile also has a damage pool which does not (only) represent physical damage, but failures in general (see below how the damage pool is used).
Each character also gets a pool of Pirate Dice (used to make checks easier), and at least two idiosyncrasies like "rum addict", "morose", or "religious fanatic".
The core game mechanic is called the "conflict system" which is used to perform actions, resolve combat, etc. SpacePirates uses a pool of d10 that signal a success when they roll 6 or more. At the start of a conflict, the involved parties state their goals (Incapacitate an enemy, outdrink somebody, make a maximum profit from a sale, etc.). Depending on the goals one of the four profiles is used as the dice pool with optional pirate dice added. Whoever has more successes wins the first round of conflict. The difference in successes is subtracted from the loser's profile's damage pool. The loser may now accept defeat or spend a pirate die to escalate the conflict. An escalated conflict continues until the damage pool of one of the participants reaches 0.
When there is no second party involved (e.g. when trying to open a locked door), the game master sets a number of successes that must be reached to win the conflict.
When a profile's damage pool reaches 0, the character may not use the profile until the pool regenerates. A rest after a conflict regenerates damage points, and more points are regenerated on each day thereafter. The pirate dice regenerate only after some hours of real time or after the gaming sessions (whichever comes first).
During an adventure, characters gain pirate points which let him raise his pirate level. Each new level gives a character new pirate dice and dice for his profiles.