Free / open source games: P - R

There are more and more free / open source games: this list, far from being exhaustive but continuously growing, gives priority to projects that keep on being developed and is meant to help whoever is looking for some fun.

All these open source games are free but remember that the term free is meant as in "free speech", not as in "free beer" so if you like one of these games please try to contribute to its development: some teams need varioul kinds of help (programmers, graphics experts...), some accepts donations to finance the development of a game, some need help to test new versions which means that you can have fun and at the same time help the development of a project.

This is the fifth part of the list and included the games from P to R: from the side menu you can access to all the other parts of the list.

Paintball is a FPS based on the Quake 2 engine where the player must shoot the opponents with a weapon loaded with balls full of colored paint.

Operating systems: Windows, Linux

Latest Version: 2.0 Alpha Build 27 (April 30 2009)

Hardware/software requirements: graphics card with 3D acceleration

Paintown is a fighting game in the same genre as Streets of Rage and Teenage Mutant Ninja Turtles.

Operating systems: Windows, Linux, Mac OS X

Latest Version: 3.5.0 (October 16 2011)

Palomino is aflight simulator that is designed to be an easy-to-fly casual game. It's possibile to choose among various airplane models and the Space Shuttle.

Operating systems: Windows, Linux, FreeBSD, NetBSD, AmigaOS

Latest Version:  20091216 (December 16 2009)

Hardware/software requirements: graphics card with 3D acceleration, OpenSceneGraph 2.8.0 or newer

Pang Zero is the free enhanced clone of old game Super Pang. The player must avoid and pop jumping balloons with a harpoon.

Operating systems: Windows, Linux, FreeBSD

Latest Version: 1.3 (July 15 2007)

Pasang Emas is the implementation of a traditional board game of Brunei called Pasang.

Operating systems: Linux, Mac OS X

Latest Version: 4.0.0 (August 5 2013)

Patriarchs is a turn-based, two player game derived from the Patriarchs Chess Gaming System. Each player controls an army, much like FIDE chess, there is the Blue Army and the Red Army with different unit types that move in different ways. Each player seeks to capture the opposition Patriarch unit to win.

Operating systems: all the ones with Python and Pygame support

Latest Version: 1.0 (August 7 2010)

Hardware/software requirements: Python 2.6 and Pygame

Peg-E is a peg solitaire game with 100 levels of difficulty.

Operating systems: Windows, Linux, Mac OS X

Latest Version: 1.1.0 (April 21 2009)

Penguin-Command is a clone of the classice game "Missile Command" with improvements in graphics and sound. The player must protect a city from an attack intercepting missiles and bombs.

Operating systems: Windows, Linux, Mac OS X, FreeBSD, Solaris, BeOS, Amiga OS

Latest Version: 1.6.11

Pentobi is a computer program that plays the board game Blokus.

Operating systems: Windows, Linux

Latest Version: 10.1 (October 15 2015)

Pictogame is a simple Java based game to play nonograms.

Operating systems: the ones with Java support

Latest Version: 0.0.8 (December 23 2010)

Pingus is inspird to classic game Lemmings. The player must lead a group of penguins to safety through a series of obstacles.

Operating systems: Windows, Linux

Latest Version: 0.7.6 (December 24 2011)

Pink Pony is a Tron­-like multiplayer racing­ game. You control little ponies that leave a trail of flowers everywhere they step. You have to evade these trails and force other ponies into them. The last pony standing wins the game.

Operating systems: Windows, Linux

Latest Version: 1.2.1 (August 19 2009)

Hardware/software requirements: graphics card with 3D acceleration

Pioneers is an implementation of the board game The Settlers of Catan that can be played over the Internet.

Operating systems: Windows, Linux, Mac OS X, FreeBSD, OpenBSD

Latest Version: 15 build 1 (October 13 2013)

PipeWalker is a clone of the NetWalk game. This is a puzzle game where pieces of a computer network are to be turned in the right/left direction to make all computers connected to the same network.

Operating systems: Windows, Linux

Latest Version: 0.9.1 (October 12 2010)

PlaneShift is an MMORPG set in a 3D virtual world constantly expanded by the players with 12 races of characters, a huge number of spells, monsters and a lot more.

Operating systems: Windows, Linux, Mac OS

Latest Version: 0.6.3 (December 24 2014)

Hardware/software requirements: 2 GHz CPU, 1 GB RAM, 1 GB hard disk, graphics card with 3D acceleration

PokerTH is a poker game that uses the Texas hold 'em rules and betting system. It's possibile to play against the computer or other players and the games allows up to seven players.

Operating systems: Windows, Linux, Mac OS X

Latest Version: 1.0 (January 1 2013)

PowerManga is a shoot-em-up similar to the old game "Galaga" where the player must fight enemies and meteors with various weapons in many levels.

Operating systems: Windows, Linux, FreeBSD, NetBSD, AmigaOS

Latest Version: 0.91 (August 16 2012)

Hardware/software requirements: graphics card with 3D acceleration

Privateer Gemini Gold is a free reproduction with a new graphic engine of the old game Privateer, part of the Wing Commander series.You inherited a small old scout class ship from your grandfather, to start over as a Privateer in a new and sparsely populated sector of the Confederation. Take your chance and become a pirate, merchant or bounty hunter upgrade your ship and experience the hard truth in a border sector where no one has anything to give away .

Operating systems: Windows, Linux, Mac OS

Latest Version: 1.03 (December 18 2009)

Hardware/software requirements: graphics card with 3D acceleration

Pyskool is a remake of the classic ZX Spectrum games Skool Daze and Back to Skool, with an emphasis on easy customisability by editing a plain text configuration file.

Sistemi operativi: Linux, Windows, FreeBSD

Latest Version: 0.6 (June 5 2011)

Hardware/software requirements: Python, PyGame

PySpaceWar is an open-source game, loosely inspired by Spacewar, Gravity Wars, and a bit by Star Control (I and II). Two ships duel in a gravity field. Gravity doesn't affect the ships themselves (which have spanking new anti-gravity devices), but it affects missiles launced by the ships. You can play against the computer, or two players can play with one keyboard. There is also a Gravity Wars mode, where the two ships do not move, and the players repeatedly specify the direction and velocity of their missiles.

Operating systems: Linux

Latest Version: 0.9.7 (March 8 2010)

Hardware/software requirements: Python 2.4 or newer, PyGame 1.6 or newer

Quadra is one of the many Tetris-derived games that includes single player and multiplayer modes through a local network or thi nternet.

Operating systems: Windows, Linux

Latest Version: 1.2.0 (June 1 2009)

Quadrupleback is a video game in which intruders must be circled. It is based on Doubleback, a Tandy Color Computer (CoCo) game by Dale Lear, published in 1982.

Sistemi operativi: Linux, Unix

Latest Version: 0.1.0 (July 14 2012)

Railroad Rampage is a cross between an arcade game and a strategy game. It is similiar in construction to many "Tower Defence" games, but it has a twist : here, you are part of the action and can affect the game in many different ways more than just building structures. Bandits are trying to rob your train and steal all precious cargo! Thankfully, you are a skilled engineer who can construct many different kinds of turrets and use them to defend your train. You have to make it through 25 waves of relentless enemy assault before you reach your destination, so plan ahead and devise a smart strategy and you may survive!

Operating systems: Windows, Linux, GP2X Wiz

Latest Version: 1.2 (10/06/2010)

Red Eclipse is an un FPS based on the Cube 2 graphics engine and it's in many ways Blood Frontier successor.

A review of the game is available.

Operating systems: Windows, Linux, Mac OS X, *BSD

Latest Version: 2.0.0 (Jupiter Edition) (December 19 2019)

Hardware/software requirements: graphics card with 3D acceleration

Rescue! Max is a 2D space, real-time, action/strategy game in which you are in control of a ship that you fly around space, fighting enemies and making friends on your way. The main objective is to rescue people from planets and take them to star bases. It is based on a old mac game called Rescue! by Tom Spreen.

Operating systems: All the ones with Java support

Latest Version: 1.0.0.3 (September 17 2013)

Hardware/software requirements: Java 1.4 or higher

Rezerk is a sequel to the classic arcade game, Berzerk. Guide the last of Evil Otto's robots on his quest to defeat the humanoids and rebuild his master!

Operating systems: Windows, Linux, Mac OS X

Latest Version: 1.0.1 (July 24 2010)

Rezerwar is a puzzle game that could be described as the illegitimate child of a known tetromino game and the average pipe game.

Cubes with pipes are falling from the factory, you need to use your arrow or vi keys to let the cubes fall in an organized manner. When pipes are connecting to the left or right side of the board, blue or green water will flow through them. The goal of this game is to get high scores, in order to get points you need to complete the longest networks of pipes (with water) as fast as possible. You may also gain points from:

• Fixing a broken pipe
• Completing a 'red' network
• Not using the 'Hold' key, at all

Operating systems:: Linux, Windows, Nintendo Wii (homebrew), FreeBSD, Amiga OS

Latest Version: 0.4.2 (May 10 2010)

Rigs of Rods (also known as RoR), is a truck, car, airplane and boat simulator. You can drive, fly or sail in total freedom in an open environment. What makes RoR different to most simulators is its unique soft-body physics: vehicles chassis and wheels are simulated in real-time as flexible objects, giving the simulation an extremely accurate behavior, while allowing the vehicles to be simply specified by their structural composition, as a network of interconnected nodes (forming the chassis and the wheels). Born as freeware the game was open sourced in february 2009.

Operating systems: Windows, Linux, Mac OS X

Latest Version: 0.36.3 (January 28 2010)

Hardware/software requirements: 2 GHz CUP, 512 MB RAM, graphics card with 3D acceleration and 128 MB RAM

Robombs is a grame inspired to the old arcade Bomberman but with 3D graphics and levels inspired to other games. Robombs was created as a multiplayer game but it's possibile to play it in single player mode as well.

Operating systems: Windows, Linux, Mac OS X, Solaris

Latest Version: 1.01 (March 1 2011)

Hardware/software requirements: graphics card with 3D acceleration, Java

Rocks'n'Diamonds is an arcade inspired to games such as Boulder Dash, Emerald Mine, Supaplex and Sokoban. The player must collect diamonds and get out of the level within a certain amount of time avoiding obstacles and enemies. The base game can be enriched with new levels and themes.

Besides the officially supported operating systems there are unofficial ports for BeOS, MorphOS, AmigaOS, PalmOS, OS/2. The last version for DOS is 3.1.0.

Operating systems: Windows, Linux, Mac OS X

Latest Version: 3.3.0.1 (June 15 2010)

Hardware/software requirements: graphics card with 3D acceleration