The third list contains all free shooters that aren't online FPS games. Such as single-player FPS's with no multiplayer, third-person shooters and 2D shooters. Some are just short tech demos that show capabilities of a game engine or piece of hardware. There are lots of single-player indie FPS games, also couple single-player shooters with storyline, which were made free years after release.
Multiplayer:
Battlefield Heroes
Battlefield Heroes is a free cartoon-style third-person shooter set in World War II, developed by Electronic Arts. Battlefield Heroes has many ingame vehicles, including tanks and aircrafts.
System requirements: 1.0 GHz CPU, 512MB RAM, 64MB video card with Pixel Shader 2.0.http://www.battlefieldheroes.com/
Alien Swarm
Alien Swarm is a free top-down perspective co-op alien shooter released free by Valve. This action shooter features 4 classes, also dozens of different weapons and achievements.
System requirements: Pentium 4 3.0 GHz, 1GB RAM, ATI X800 / NVidia 6600.http://www.alienswarm.com/
CrimeCraft
CrimeCraft is a third-person shooter that blends an action-packed shooter with role-playing elements. CrimeCraft is set in the near future where gangs have replaced governments.
System requirements: 1.6 GHz Intel single core, 1024MB RAM, GeForce 7600 / ATI X1600.http://www.crimecraft.com/
GunZ The Duel
GunZ The Duel is a free online third-person shooter where you can also use melee weapons like swords and daggers. GunZ has microtransaction system for buying premium items.
System requirements: Pentium III 500 MHz, 256MB RAM, Direct3D 9.0 video card.http://gunz.ijji.com/
S4 League
S4 League is a free-to-play multiplayer online third-person perspective shooter with cartoon characters. This fast-paced anime shooter has strategical gameplay and 6 game modes.
System requirements: Pentium III 1 GHz, 256MB RAM, NVIDIA GeForce 4MX.http://s4.en.alaplaya.net/
Battleswarm: Field of Honor
Battleswarm: Field of Honor is a blend of FPS and real-time strategy. Humans in this free game are played in FPS or TPS mode, bugs are commanded by real time strategist.
System requirements: 2.2 GHz processor, 1024MB RAM, 64MB DirectX 7 level video card.http://www.battleswarm.net/
Soldat
Soldat is a free, unique side-view multiplayer shooting game that has fast action gameplay with lots of blood. Soldat is mix of Liero, Worms, Quake and Counter-Strike.
System requirements: 333 MHz CPU, 32MB RAM, DirectX 8.1 graphics card.http://www.soldat.pl/
Counter-Strike 2D
Counter-Strike 2D is a free 2D clone of the famous multiplayer shooter: Counter-Strike. There are also four new modes: Deathmatch, Team Deathmatch, Construction and Zombies.
System requirements: 500 MHz CPU, 64MB RAM, 16MB DirectX 7+ 3D video card. http://www.cs2d.com/ (also available for Linux and Mac)
Single-player:
S.T.A.L.K.E.R. build 1935
S.T.A.L.K.E.R. build 1935 is a free to download build of S.T.A.L.K.E.R.: Shadow of Chernobyl. Build 1935 contains many features that didn't make it into the final release, also many bugs.
System requirements: 1.4 GHz CPU, 512MB RAM, 64MB GeForce 3.Download & guide
Interstellar Marines
Interstellar Marines is an in-development browser based, high quality first-person shooter. This single-player shooter set in a realistic and unpredictable future.
System requirements: Intel Core 2 Duo 2.2 GHz, 2GB RAM, GeForce 8800 GTS 640MB.http://www.interstellarmarines.com/
PRISM: Guard Shield
PRISM: Guard Shield is a first-person shooter with a blend of stealth operations and fast gameplay. PRISM: Guard Shield is created by the Army National Guard and Rival Interactive.
System requirements: 1.5 GHz Athlon 64, 256MB RAM, Geforce 4 / ATI 9600 64MB.http://www.prismthegame.com/
Area 51
Area 51 is a single-player Sci-Fi first-person shooter released as freeware by the US Air Force. It features over 15 types of weapons/equipment and a campaign with 8 levels.
System requirements: Pentium III 1.4 GHz, 256MB RAM, 64MB ATI 9500 / GeForce 3. Download
Euthanasia
Euthanasia is a first-person horror shooter with lots of riddles and puzzles in ten fully playable levels. Euthanasia features disturbing athmosphere and lots of horrorsequences.
http://www.moddb.com/games/euthanasiaNoah's Jungle
Noah's Jungle is an unique FPS where you explore jungle forest and capture wild animals. You play as an insane scientist who is ‘saving’ the animals of the jungle.
http://www.noahsjungle.com/The Suffering
The Suffering is a free, but ad-supported horror themed third/first-person shooter. The player in this shooter is set in maximum-security prison, after earthquake had released the monsters.
System requirements: Pentium III 1.0 GHz, 128MB RAM, 32MB DirectX video card. Download
Hidden & Dangerous Deluxe
This action shooter was made free to promote the release of Hidden & Dangerous 2. Deluxe release also includes Devil's Bridge expansion pack, patches, and the level editor.
System requirements: Pentium 166 MMX, 16MB RAM, 2MB VRAM. Download
Derelict
Derelict is freeware tactical first-person shooter with a Sci-Fi survival horror theme. The player in this shooter has to guide his squad of 4 marines, through increasingly dangerous levels.
http://earok.net/derelictLego Wolf3D
Lego Wolf3D is a fan-made first-person shooter that combines Lego and Wolfenstein 3D using the C4 game engine. This free single-player FPS is currently in beta.
System requirements: GeForce FX 5200 / ATI Radeon 9500 / Intel GMA X3000 or higher.http://www.drdanick.com/legowolf3d/
theHunter
theHunter is a very realistic hunting game set in open world island. Free version features only one huntable animal (mule deer), paid members can hunt all other animals.
System requirements: Pentium 4 3 GHz, 1GB RAM, 256MB Shader Model 3.0 video card. http://www.thehunter.com/
WHITE: The Game
WHITE is the first first-person shooter based on both the player's violence and creativity. You can create unique artwork by killing creatures that are filled with paint.
http://www.white-the-game.com/The Hunted
The Hunted is a standalone single-player FPS based on the Darkplaces engine. The Hunted is about a lone survivor escaping from a city that has overcome by the infected.
http://the-hunted.com/The Hunted Chronicle 2
The Hunted Chronicle 2 is a single-player survival horror first-person shooter based off of the Darkplaces engine. The Hunted Chronicle 2 is sequel to The Hunted.
http://the-hunted.com/Glitch
Glitch is a free to download first-person shooter that is set in a unique 3D environment in which all of the entities are constructed from particles.
https://www.digipen.edu/?id=1170&proj=1470Terror Attack: Project Fateh
Terror Attack: Project Fateh is a 3D first-person shooter based on the 26/11 Mumbai terror attack. Terror Attack is developed by Shivam Sai Gupta, a 14 year old teen living in India.
System requirements: Intel Core 2 Duo 2.0 GHz, 1GB RAM, 512MB DirectX9 video Card. http://www.projectfateh.com/Lone Wolf 3
Lone Wolf 3 is a freeware first-person 3D shooter which doesn't need installation. This one man project features 5 realtime generated worlds and 13 nicely animated weapons.
System requirements: 2 GHz CPU, 2GB RAM, GeForce3 or similar 3D card.http://www.venomsoftware.de/games.php
Chex Quest 3
Chex Quest 3 is a free single-player FPS, released 12 years after original CQ by two original developers (Charles Jacobi and Scott Holman). It also includes two previous Chex Quests.
http://www.chucktropolis.com/gamers.htmTag: The Power of Paint
Tag: The Power of Paint is a DigiPen student-developed first-person platformer that won the Best Student Game Award in 2009. Tag is a mix of first-person shooter and puzzle game.
https://www.digipen.edu/studentprojects/tag/Firestart
Firestart is reimaging of the classic C64 game, Project Firestart as a first-person shooter. It is set in the distance future when a ship orbiting Mars has been overrun by monsters.
http://earok.net/firestart Harmony
Harmony is a free FPS game made by Thomas van der Velden, that is inspired by nineties 3D shooters. This Zdoom engine based shooter features 11 maps and high resolution sprites.
http://rabotik.nl/harmony.htmResonation
Resonation is a first-person shooter that utilizes the frequency of sound waves for gameplay. Player has to solve mysteries and eliminate monsters utilizing the different frequencies.
https://www.digipen.edu/?id=1170&proj=452Resident Evil Memory
Resident Evil Memory is a free indie first-person shooter video game tribute to the Resident Evil series. Resident Evil Memory features zombie killing and many puzzles.
System requirements: Pentium 4 2.66 GHz, 1GB RAM, 128MB Video Card.http://residentevilmemory.blogspot.com/
WGRealms 2
WGRealms 2 is the free sequel to WG Realms. It is a standalone, fantasy style total conversion of DukeNukem 3D with new kickass weapons, inventory and abilities.
http://two.wgrealms.com/Action Doom 2: Urban Brawl
Action Doom 2: Urban Brawl is the prequel to Action Doom with Beat-em-up’ style gameplay. This free shooter features over 15 weapons, 9 levels and dozens of new enemies.
http://action.mancubus.net/ Decay
Decay is a free-to-download horror first-person shooter with 6 action-loaded and exiting levels. You need to download a patch to change the language from German to English.
System requirements: Pentium 4 2.0 GHz, 512MB RAM, ATI Radeon 9600.http://www.moddb.com/games/decay
Voxelstein 3D
Voxelstein 3D is a free FPS inspired by Wolfenstein 3D, with fully destructible levels. The world in this shooter is built from tiny cubes (voxels) that can be added or removed very quickly.
http://voxelstein3d.sourceforge.net/Black Shades
Black Shades is a free simple first-person shooter which was one of the winners of the UDevGame 2002 contest. It features randomly generated city and fluid aiming system.
http://www.wolfire.com/black-shades (also available for Mac)Kill the avatars
Kill the avatars is an extremely small experimental FPS made for players entertainment. It is a shooter that takes all the fun of killing avatars and puts it all into nice little package.
http://www.moddb.com/games/kill-the-avatarsGet Bin Laden!
Get Bin Laden! is a free single-player FPS with small download size. In this shooter you have to shoot your way past dozens of enemies to locate Bin Laden's secret hideaway.
Minimum requirements: 500 MHz CPU, 64MB RAM, 32MB 3D graphics card.http://www.atticgamez.com/Attic_Games/bin_laden.htm
Deadly Tower
Deadly Tower is a small experimental arcade first-person shooter made by two people with 36 hour production time. Deadly Tower has three playable levels.
http://www.moddb.com/games/deadly-towerHalf-Life 2: Lost Coast
Half-Life 2: Lost Coast is a playable technology demonstration that introduces HDR lighting to the Source engine. Lost Coast features one level that was removed from original Half-Life 2.
System requirements: Pentium 4 2.4 GHz, 1GB RAM, DirectX 9 level graphics card.ATI , NVIDIA
Avert Fate
In Avert Fate you fight killer droids with heavy weaponry, while exploring next-gen environment. This tech demo shows what a two-man team can do with Unity in a couple of months.
http://unity3d.com/gallery/live-demos/avert-fateCellfactor Revolution
CellFactor: Revolution is a tech demo that shows off the capabilities of the Ageia PhysX cards. Two levels in CellFactor are playable even if you don't have the PhysX accelator card.
System requirements: Dual core processor, 2GB RAM, ATI X1800+ / NVIDIA 7800+.Download
.kkrieger
.kkrieger is a free single-player first-person shooter that uses only 96KB (!!!) of disk space. This extremely small shooter won the Breakpoint 96k game competition in 2004.
System requirements: 1.5GHz CPU, 512MB RAM, 128MB GeForce4 Ti / ATI Radeon 8500.http://www.theprodukkt.com/kkrieger
Flamewar!
Flamewar! is a satire about internet culture.
DownloadNext list: Multiplayer FPS demos