Listing of Action in Games
- openThief
- License: Freeware
- Price: 0.00

openThief is a project to test the feasibility of an open source 'Thief' like game from original LookingGlass first person stealth game.
openThief License - GNU Library or Lesser General Public License (LGPL).
- Publisher: Openthief
- Date: 15-06-2013
- Platform: WinOther
- OpenTrespasser
- License: Freeware
- Price: 0.00

OpenTrespasser will be a remake of the original "Jurassic Park: Trespasser" engine, which will use the resources from the original game, and provide new functionality to them.
OpenTrespasser License - GNU General Public License (GPL).
- Publisher: Opentress
- Date: 07-09-2013
- Platform: WinOther
- OpenUnreal Engine
- License: Freeware
- Price: 0.00

Open Unreal Engine is basically an engine that allow to play games based on the Unreal Engine for the modern computers and more...
OpenUnreal Engine License - GNU General Public License (GPL).
- Publisher: Openunrealengin
- Date: 06-11-2013
- Platform: WinOther
- OpenVision 3D
- License: Freeware
- Price: 0.00

OpenVision 3D is a name for a collection of two OpenSource projects. The projects aims towards the goal of making an easy to use 3D multipurpose engine and showing this off with a basic First Person Shooter multiplayer game.
OpenVision 3D License - zlib/libpng License.
- Publisher: openvision3d.com
- Date: 18-11-2013
- Platform: WinOther
- Operation Alpha Zylon
- License: Freeware
- Price: 0.00

Looking for some free mission games to download? Alpha Zylon brings you to the darkest forests of Africa, the dry deserts of the middle-east and the most dangerous places on the rooftops of MegaCity. Download free mission game to take out dozens of enemies, traps, gun turrets, bunkers, jeeps, and other dangers with your knife, hand gun, machine gun, grenade launcher, satchel charges or even sniper rifleiIn six varying missions! Do you still fancy getting some mission games free to download? No trials.
- Publisher: myplaycity.com
- Date: 24-11-2013
- Size: 121292 KB
- Platform: Windows 7, Windows 8, WinOther, WinVista
- Operation City 21
- License: Freeware
- Price: 0.00

Operation City 21 is a full Half-Life 2 conversion mod, about Adrian Shephard's travels in the new world ruled by the Combine. The game takes place during the timeline of Episode Two in City 21, another Eastern European city near City 17.
Completely new story, Siege vehicle gameplay! (Not telling you when though), New weapons!, You get to play as Corporal Shephard again!, Completely uninterfering with the actual HL2 storyline!, Based on VALVe's award-winning Source Engine.
- Publisher: Operationcity14
- Date: 20-07-2013
- Platform: WinOther
- Operation Mars
- License: Freeware
- Price: 0.00

The belligerent aliens from another Galaxy conquered Mars. Free the planet from the invaders. As a pilot of a space ship, join battle to free the population of the planet. Well-equipped detachments of enemies' spaceships stand in your way. Destroy the enemies and free the conquered territories from level to level.
- Publisher: freegamesway.com
- Date: 30-10-2013
- Size: 2211 KB
- Platform: Win2000, Windows Server, WinOther, WinVista
- Operation Overlord: War Hero
- License: Freeware
- Price: 0.00

This is a game based on the operation Overlord during the world war 2..
- Publisher: Oowh
- Date: 14-10-2013
- Size: 35844 KB
- Platform: Linux, Mac OS X, WinOther
- Operation Ubersoldat
- License: Freeware
- Price: 0.00

WW2 first person shooter. In the beginning of World War 2 German Special research unit begins development of the Ubersoldat - a super soldier with powerful capabilities. Even though the research is kept strictly secrecy, the Americans learn of the German plans and send their best secret service agent to Germany with the order to destroy the experimental plants.
- Publisher: gamehitzone.com
- Date: 14-11-2019
- Size: 189513 KB
- Platform: Win2000, WinXP, Win7 x32, Win7 x64, Windows 8, Windows 10, WinServer, WinOther, Windows2000, Windows2003, Windows Server 2000, Windows Server 2003, Windows Server 2008, Windows Server 2008r2, Windows Server 2012, Windows Tablet PC Edition 2005, Windows Media Center Edition 2005, WinVista, Windows Vista, WinVista x64
- Operation: Assassination
- License: Freeware
- Price: 0.00

Operation: Assassination is an assassination Simulator, where you can use Lua to create your own scenarios. Maps can also be made for this game, with adjustable weapons.
Operation: Assassination License - GNU Library or Lesser General Public License (LGPL).
- Publisher: Op-assasination
- Date: 07-08-2013
- Platform: WinOther
- OPERATORS.LV
- License: Freeware
- Price: 0.00

OPERATORS.LV MULTI GAMING PROJECT
OPERATORS.LV License - Public Domain.
- Publisher: Operatorslv
- Date: 11-11-2013
- Platform: WinOther
- Orange DeathTag Generator for BF2
- License: Freeware
- Price: 0.00

The Orange DeathTag Generator (odt-gen) helps the User to create a orange death tag in battlefield 2.
Orange DeathTag Generator for BF2 License - GNU General Public License (GPL).
- Publisher: Odt-gen
- Date: 10-07-2013
- Platform: WinOther
- Orange Game
- License: Shareware
- Price: 0.99

In a remote town called Farmocolis, Uncle Bob asks for his nephew's help to catch some oranges. Little Zoy thought it was a boring task so, to make things interesting, he decided to retrieve the oranges in a rather unusual way. Instead of using a basket to carry oranges like a normal person, he uses a helmet with a spring attached.
- Publisher: Zona Paradoxal Lda.
- Date: 22-04-2014
- Size: 3072 KB
- Platform: Windows Phone, WinMobile
- OrangeCatch
- License: Freeware
- Price: 0.00

There you go...with your pretty basket, out to catch the falling oranges. You got to catch a lot if them to win the match. Make sure you don't get the leaves trapped in your basket. It will reduce your life. Use the weapon..stones, to destroy the leaves.
- Publisher: AZINOVA TECHNOLOGIES PRIVATE LIMITED
- Date: 22-04-2014
- Size: 5120 KB
- Platform: Windows Phone, WinMobile
- Orbion
- License: Shareware
- Price: 0.99

Orbion is a challenging reflex game where your main objective is to catch the colorful orbs using the matching color segment of the wheel.
Use your finger to rotate the wheel. Don't let the orbs touch the wrong color piece, or you will lose a life!
Some orbs may have different special effects, which will keep the gameplay exciting throughout the duration of the game.
- Publisher: EyePower Games Pte. Ltd.
- Date: 22-04-2014
- Size: 13312 KB
- Platform: Windows Phone, WinMobile
- Orbital Rendezvous
- License: Shareware
- Price: 0.99

In Orbital Rendezvous, you'll pilot an Orbiter: a nimble, high-powered spaceship for travel in the Earth-Moon system and surrounding space. You'll learn to launch your Orbiter, find your destination, and make a safe rendezvous. You'll have to approach carefully and match velocities, or you'll crash!
Besides From the Earth to the Moon, the free version of Orbital Rendezvous includes these missions:
*Lunar Round Trip: Pilot your orbiter from the Earth to the Moon, and back again!
*Meteor Swarm: Run to the Moon, but watch out for meteors!
And if you purchase Orbital Rendezvous, you'll get additional missions:
*Adrift: Rescue the crew of a derelict spacecraft!
*Race to the Moon: You have two days to reach the Moon!
*Space Station Supply Run: Deliver supplies to the Space Station!
*L4: Test your piloting skills! Rendezvous with LaGrange Point 4!
*Passenger Route: Deliver passengers to the Space Station and then to the Moon!
And more! Plus Secret, Top Secret, and Eyes Only missions that you can unlock by performing other missions.
- Publisher: Software Basement Tapes
- Date: 22-04-2014
- Size: 13312 KB
- Platform: Windows Phone, WinMobile
- Orbital Station 42
- License: Freeware
- Price: 0.00

Orbital Station 42 is a large map for the game Tremulous.
Orbital Station 42 License - GNU General Public License (GPL).
- Publisher: Os42tremmap
- Date: 24-07-2013
- Platform: WinOther
- Orczz - Extended Edition
- License: Shareware
- Price: .price.

Stop an army of thirsty monsters from capturing and drinking your delicious honey wine in Orczz Extended Edition, a satisfying good time.
The land of Whiteleaf is home to the Knights of the Order of the Mug, those who stand and protect not only their country, but the Mead, a precious honey wine they are so fond of drinking.
- Publisher: GameHouse
- Date: 21-07-2013
- Size: 1617 KB
- Platform: Windows 7, WinOther, WinVista
- Order and Resistance
- License: Freeware
- Price: 0.00

Order and Resistance is a open-source FPS game using Irrlicht Engine. Its under New-BSD License and will be available for Windows, Linux and MAC.
Order and Resistance License - MIT License.
- Publisher: Orderresistance
- Date: 19-10-2013
- Platform: WinOther
- Orion3D (O3D) FPS Creator
- License: Freeware
- Price: 0.00

Orion3D Engine (O3D) is a modern 3d engine with some extra features:Bump-mappingMore graphics features....3D SoundMap EditorMods system (With text editor, you can make mods)Very flexible game architectureIntegrated powerful HUD (No winAPI!)
Orion3D (O3D) FPS Creator License - GNU General Public License (GPL).
- Publisher: O3d
- Date: 24-08-2013
- Platform: WinOther
- Oriship Map with Models
- License: Freeware
- Price: 0.00

Map of my Oriship with about 9 models from Votekick
Oriship Map with Models License - GNU General Public License (GPL).
- Publisher: Rporiship
- Date: 12-10-2013
- Platform: WinOther
- Ortex
- License: Freeware
- Price: 0.00

This is my first real game in a long time, and also my first shu'mp ever! In this game I tried to mimic some of cactus's work (namely "fractal fighter" and "protoganda strings") to create a game which is pretty much an endless stream of bosses, rather than levels or just regular enemies.
- Publisher: NFYRE
- Date: 15-06-2013
- Size: 6707 KB
- Platform: Win2000, WinOther
- Orxonox
- License: Freeware
- Price: 0.00

Orxonox is a mix between a first-person 3D shooter and spacecraft shooter. It plays in a post apocalyptic world, where humanity struggles to survive under the constant threat of extermination by the Noxons.
Orxonox License - GNU General Public License (GPL).
- Publisher: orxonox.net
- Date: 17-10-2013
- Platform: WinOther
- OS Apocalypse
- License: Shareware
- Price: 0.99

The idea of OS Apocalypse came from one of the most popular game, Asteroid.
The game is simple: you have to shoot Android,iOS and WP7 logos to earn points; the smaller the logo hit, the higher the score earned.
With the increase of the score will increase the number of OS logos and their speed.
- Publisher: stilatore
- Date: 22-04-2014
- Size: 1024 KB
- Platform: Windows Phone, WinMobile
- Osiris Team
- License: Freeware
- Price: 0.00

The Osiris Team Project is a development effort based around the popular game Half-Life 2.
Osiris Team License - GNU General Public License (GPL).
- Publisher: Osiristeam
- Date: 15-10-2013
- Platform: WinOther
- Otto Matic Demo
- License: Demo
- Price: .price.

The year is 1957 and a fleet of flying saucers from Planet X have come to Earth. These saucers are under the control of the evil Brain Aliens who are abducting helpless human beings and taking them away to strange alien worlds to become slaves of The Giant Brain.
- Publisher: Ideas From the Deep
- Date: 09-12-2006
- Size: 14828 KB
- Platform: Win2000, Windows Server, WinOther
- Ouroboring Life
- License: Freeware
- Price: 0.00

Goal of the game is simply to live a good life, and as we all know, it's simply frigging impossible unless you have wife, kids and a damn dog!
You start as an average John or Jane Doe, and run through your life in 40 seconds. During this you come across events, and the quality of your life will either improve or get worse depending on how you handle them.
- Publisher: Kajak Games Osk
- Date: 22-04-2014
- Size: 9216 KB
- Platform: Windows Phone, WinMobile
- Outernet Bone County Role Play (MTA)
- License: Freeware
- Price: 0.00

An open source gamemode for the open source mod Multi-Theft Auto. Implementing revolutionary systems for arms dealing, drug dealing, point battles and housing, it's less of a platform shooter, and more of an modern life roleplay game.
Outernet Bone County Role Play (MTA) License - GNU General Public License version 3.
- Publisher: Outernetmta
- Date: 27-10-2013
- Platform: WinOther
- Outliner
- License: Shareware
- Price: .price.

Outliner looks like the classic Asteroids but it's all about shooting waves of enemy spacecraft. Mouse controlled, the game is fast and smooth and wireframe in appearance but the action is frenetic. Many game types are supported and most game types support two play simultaneous play with mouse, keyboard, or multiple joystick control.
- Publisher: Cornutopia
- Date: 24-11-2009
- Size: 2560 KB
- Platform: Win2000, WinOther
- Outpost Kaloki
- License: Shareware
- Price: .price.

Race against time to save the princess in Outpost Kaloki, a humorous space-based tycoon game! Solve challenges, entertain visiting aliens, keep your ratings high, and rake in the money on your way to fame and glory. However, if you fail to keep your customers happy AND maintain your station's needs you'll find yourself out of cash and out of luck at the edge of civilized space.
- Publisher: wildtangent.com
- Date: 09-08-2013
- Size: 952 KB
- Platform: Windows 7, WinOther, WinVista












