Counter-Strike 1.6
Tactical 5v5 round-based FPS, the original.
The CS that defined LAN parties. AMXX + 100 tickrate.
Counter-Strike: Condition Zero
Tactical 5v5 round-based FPS.
Hostage rescue and bomb defuse, the way it was.
Counter-Strike: Source
Tactical 5v5 round-based FPS, Source-engine remake.
cs_office still pulls full lobbies, 22 years on.
Team Fortress Classic
Class-based 9v9 objective FPS.
The original Team Fortress. Spy disguises, soldier rockets.
Team Fortress 2
Class-based 12v12 FPS.
Released 2007. Valve still ships updates.
Day of Defeat
WWII squad FPS.
The HL1 mod that shipped retail.
Day of Defeat: Source
WWII squad FPS, Source-engine.
Slower TTK, scoped K98s, no respawn waves.
Half-Life 2: Deathmatch
FFA + team Source-engine deathmatch.
Gravity gun and crossbow. Free with Half-Life 2.
Black Mesa: Deathmatch
Source-engine HL1 deathmatch remake.
Crowbar Collective's HL1 remake brought DM along too.
GoldenEye: Source
N64 GoldenEye 007 remake on Source.
1997's GoldenEye 007, rebuilt by fans. Free.
Urban Terror
Realistic FFA / TDM tactical FPS.
Q3 mod that went standalone. Master server since 2000.
Left 4 Dead
Co-op 4-player zombie FPS.
AI Director, four survivors, infected horde.
Left 4 Dead 2
Co-op 4-player zombie FPS.
More campaigns, more weapons, one canon outbreak later.
Garry's Mod
Sandbox + Lua-modded gamemodes.
TTT, DarkRP, Prop Hunt. Built on HL2.
Medal of Honor: Allied Assault
WWII squad FPS (+ Spearhead, Breakthrough).
The Saving Private Ryan FPS. Omaha Beach in 2002.
Wolfenstein: Enemy Territory
Free WWII team-objective FPS.
Free since 2003. Paratroopers, panzerfausts, dynamite.
Quake Live
Quake III Arena re-release.
Q3 Arena, free in browser. Now community-run.
OpenArena
FOSS Quake III Arena replacement.
Open art assets, open code, open server.
Zombie Panic! Source
Asymmetric co-op survival.
Humans vs. zombies on Source. Free.
Fistful of Frags
Wild West deathmatch.
Six-shooters, dynamite, lever-actions.
Sven Co-op
Half-Life co-op campaign.
Half-Life turned co-op. Free since 1999.
Jedi Knight: Jedi Outcast
Lightsaber FPS / TPS.
Kyle Katarn returns. Lightsabers in the Q3 engine.
Jedi Knight: Jedi Academy
Lightsaber FPS / TPS.
Build your own Jedi. Stance switching, Force lightning.
America's Army 2.5
Tactical squad MILSIM.
US Army-funded. Real cooperative tactics.
America's Army: Proving Grounds
Tactical squad MILSIM.
Army shut servers in 2022; community kept it running.
Counter-Strike 2
Tactical 5v5 round-based FPS, Source 2 rebuild.
CS:GO replaced overnight in 2023. Same idea, sub-tick netcode.
Battlefield 2
32-player combined-arms warfare.
Squads, commanders, jets. Server scene survives via BF2Hub.
Battlefield 2142
Sci-fi BF2 with mechs and Titans.
EA pulled the master in 2014. OpenSpy keeps it alive.
Project Reality: BF2 mod
Realism mod for BF2, militant ruleset.
Slow squads, real radios, long downtime. Modders' BF2.
Star Wars: Battlefront II (2005)
Class-based Star Wars MP.
GameSpy died in 2014. SWBFSpy brought servers back.
Star Wars: Battlefront (2004)
Class-based Star Wars MP, original entry.
Endor and Hoth, the way they shipped.
Halo: Custom Edition
Halo PC + custom maps + SAPP modding.
Halo PC's modding scene never quit.
Quake III Arena
Pure arena FPS.
Strafe-jump, rocket-jump, rail. Still tournament-relevant.
Quake 2
Arena + CTF FPS.
1997 launch. 2023 remaster. Same rocket arc.
Return to Castle Wolfenstein
WWII team-objective FPS, supernatural twist.
Paratroopers + zombies. Spawned Wolf:ET.
Call of Duty: World at War
WWII squad FPS + Nazi Zombies.
Plutonium server scene rivals modern CoDs.
Call of Duty: Black Ops 1
Cold War squad FPS.
Plutonium revived dedicated servers. Nuketown forever.
Call of Duty: Black Ops 2
Near-future squad FPS, branching story.
League Play and S&D, kept alive by Plutonium.
Call of Duty: Modern Warfare 3
Modern setting team FPS.
Survival co-op, Search & Destroy. Plutonium-dedicated.
Call of Duty: Modern Warfare 2 (2009)
Modern team FPS, 6v6 + Spec Ops.
IW4x rebuilt the netcode. Rust 1v1 still happens.
Call of Duty 4: Modern Warfare
Modern team FPS, 6v6 standard.
Reset the genre. CoD4X keeps the master alive.
C&C Renegade
C&C universe FPS / TPS.
Westwood's only FPS. W3D Hub still hosts it.
Renegade-X
Free standalone Renegade remake.
Modders rebuilt Renegade in UE3. Free.
Xonotic
FOSS arena shooter, Q3 lineage.
Active fork of Nexuiz. Open code, open assets.
Warfork
FOSS arena shooter, Warsow successor.
Forked from Warsow when its development stalled.
Warsow
Cel-shaded arena shooter, trick-jumping focus.
Trick-jumping arena. Cell shading. Successor: Warfork.
Unvanquished
FOSS aliens-vs-humans RTS/FPS hybrid.
Tremulous successor. Build, defend, evolve.
Zandronum
Modern Doom multiplayer.
Skulltag fork. Dueling, CTF, invasion modes.
ZDaemon
Classic Doom multiplayer.
Dedicated Doom server scene since 2002.
Odamex
Vanilla-faithful Doom multiplayer.
Plays like 1993 Doom, with modern netcode.
Painkiller
Arcade demon-slaying FPS.
Soul stakes, electrified railguns. Never paused.
Phantasy Star Online: Blue Burst
MMO with centralized "ship" servers, not a per-tenant rental.
Sega abandoned the servers; Sylverant kept them online.
MOH: Spearhead
MOHAA expansion: Battle of the Bulge.
Bastogne, the Bulge, paratrooper kits.
MOH: Breakthrough
MOHAA expansion: Italian + N. African front.
Anzio, Bizerte, Sicily. 8th Army campaigns.
Half-Life Deathmatch
Half-Life multiplayer deathmatch.
Crossbow + crowbar duels. Free with Half-Life.
Half-Life: Opposing Force
HL1 expansion: co-op + deathmatch.
Play as the soldiers shooting Freeman. Wrench, displacer.
Half-Life: Uplink Custom
HL1 demo levels turned multiplayer.
The Uplink demo, expanded into a live custom server.
Deathmatch Classic
Quake-faithful deathmatch in GoldSrc.
Valve's homage to Quake 1. Free with Half-Life.
Action Half-Life
John Woo–inspired action mod.
Akimbo pistols, gun-fu, bullet-time. Free HL1 mod.
Action Half-Life 2
AHL successor on Source.
Akimbo pistols + bullet-time, ported to HL2.
Shattered Frag City
Multi-arena HL1 deathmatch mod.
FFA in fractured arenas. Cult HL1 mod.
Half-Life: Deathmatch Source
HL1 DM ported to Source.
Source-engine HLDM. Crossbow rampages, in HD.
IOSOCCER
Soccer simulation on HL2.
11v11 footy on Source. The internet's strangest mod.
Open Fortress
TF2 mod blending TFC + Quake.
Free Source mod. Quake-style movement on TF2 maps.
Insurgency
Hardcore tactical FPS.
One-shot lethal. Squad-based push/break. Modder darling.
Call of Duty
OG WWII squad FPS.
Before Modern Warfare. Stalingrad, Carentan, Brécourt.
Call of Duty 2
WWII squad FPS, regenerating-health debut.
El Alamein, Pointe du Hoc. CoD2's MP era.
Killing Floor
Co-op wave-based zombie FPS.
UT2004 mod gone retail. Specimens, perks, trader pods.
Killing Floor 2
Co-op wave-based zombie FPS, sequel.
More gore, more weapons, more ZEDs.
Unreal Tournament
Arena FPS, the genre's pillar.
Headshot. M-M-Monster kill. Facing Worlds, Deck16.
Unreal Tournament 99
Unreal Tournament classic.
AKA UT99. The 1999 retail release, GOTY edition.
Unreal Tournament 2004
UT sequel, vehicle warfare added.
Onslaught, Vehicle CTF, AS. Manta runs. Hoverboards.
Unreal Tournament 3
UT on Unreal Engine 3.
Necris invasion. Last UT to ship retail.
UT4Ever
Community fork of UT4.
Keeps UT4 alive after Epic shelved it. Free.
QuakeWorld
Network Quake 1 client.
id's TCP/IP rewrite of Quake. Birthed competitive FPS.
Quake 4
Quake on id Tech 4.
Strogg invasion. Raven's Q3-era successor.
Reflex Arena
Modern arena FPS, Q3/CPMA-inspired.
Strafe-jump, rocket-jump, focused weapons. Now free-to-play.
Quake Champions Doom Edition
Doom mod with Quake Champions characters.
Quake Champions in the Doom engine. Runs on GZDoom.
Enemy Territory: Legacy
Wolf:ET fork, modern OS support.
Same Wolf:ET, runs on contemporary Linux/macOS/Win.
Natural Selection
Asymmetric RTS-FPS hybrid.
Marines vs aliens on HL1. Commander mode.
Natural Selection 2
Standalone NS sequel.
Custom Spark engine. Dynamic infestation, Fade blink.
SA-MP: San Andreas Multiplayer
GTA: San Andreas online mod.
Hundreds of players in Los Santos. RP, freeroam, races.
Multi Theft Auto: San Andreas
Predecessor of GTA online MP.
Independent open-source MTA team. SA-MP's older sibling.
Red Orchestra: Ostfront 41-45
WWII Eastern-front MILSIM.
Slow ADS, no killcam, free-aim tanks. Stalingrad on UE2.
Darkest Hour: Europe '44-'45
RO mod: Western front WWII.
Bocage, Bastogne, the Bulge. Fan-made, free.
Battlefield 1942
WWII combined-arms warfare.
The original Battlefield. Tanks, planes, jeeps, conquest.
Battalion: Legacy
Modern WWII competitive FPS.
CoD2-inspired throwback on UE4 netcode.
Operation: Harsh Doorstop
Free milsim sandbox.
UE5 large-scale infantry. Squad/PR-adjacent. Free.
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