QUAD DAMAGE
Masters online · free & open source

OPENASE

THE EYE IS BACK.

The legendary server browser from the LAN-party days, rebuilt from scratch. Find a server, check the ping, spot your mates, double-click, frag. Quake 3, Urban Terror, Enemy Territory, Call of Duty, Jedi Knight, Return to Castle Wolfenstein, QuakeWorld, Unreal Tournament, Multi Theft Auto, Battlefield, Counter-Strike, DOOM 3, Tribes and more: 70 games in all, now with an English and French interface.

GPL-3.0 · no account · no ads · native Rust, starts instantly
0live servers
0games
0master servers
15protocols

Muscle memory

Exactly where you left it.

Filter tree on the left. Servers on the right. Friends, players and rules at the bottom. Colored names, padlocks, your favorites starred. Your hands still know the way.

OpenASE showing Call of Duty 2 servers with location, colored names, ping, flux, packet loss, players, game type, map and address, and the filter tree with game types, mods, kill cam and punkbuster filters.
Game types + checkbox filters
Ping · Flux · PL
Country from GeoIP
Friends · Players · Rules

Pick your poison

70 games. Live masters.

Every list below comes from a master server that is still answering today, or from the Steam Web API. Pick a game, hit F5, watch the list fill up.

Quake 3 engine

Q3

Quake III Arena

quake3arena · excessiveplus · dpmaster

UrT

Urban Terror

master.urbanterror.info

OA

OpenArena

dpmaster.deathmask.net

ET

Enemy Territory

idsoftware · etlegacy masters

CoD

Call of Duty

Activision master

CoD2

Call of Duty 2

Activision master

CoD4

Call of Duty 4

Activision master

CoDUO

Call of Duty: United Offensive

coduomaster.activision.com

JK2

Jedi Outcast

jkhub · jk2mv masters

JKA

Jedi Academy

jkhub · jk2mv masters

RtCW

Return to Castle Wolfenstein

wolfmaster.idsoftware.com

EF

Star Trek: Voyager Elite Force

master.stvef.org · efmaster.tjps.eu

SoF2

Soldier of Fortune II: Double Helix

master.1fxmod.org

Quake 2 and QuakeWorld

QW

QuakeWorld

master.quakeservers.net · qwmaster.fodquake.net

Q2

Quake 2

master.quakeservers.net · master.itbacon.com

KP

Kingpin

master.kingpin.info · master4.kingpin.info

Half-Life and Source (Steam)

CS

Counter-Strike 1.6

Valve A2S · Steam Web API key

TFC

Team Fortress Classic

Valve A2S · Steam Web API key

DoD

Day of Defeat

Valve A2S · Steam Web API key

HL

Half-Life

Valve A2S · Steam Web API key

CZ

Counter-Strike: Condition Zero

Valve A2S · Steam Web API key

OF

Half-Life: Opposing Force

Valve A2S · Steam Web API key

DMC

Deathmatch Classic

Valve A2S · Steam Web API key

RIC

Ricochet

Valve A2S · Steam Web API key

CS:S

Counter-Strike: Source

Valve A2S · Steam Web API key

DoD:S

Day of Defeat: Source

Valve A2S · Steam Web API key

HL2DM

Half-Life 2: Deathmatch

Valve A2S · Steam Web API key

Unreal engine

UT

Unreal Tournament

GameSpy via 333networks

UN

Unreal

333networks · OpenSpy

DX

Deus Ex

333networks

RU

Rune

333networks · OpenSpy

WoT

Wheel of Time

333networks

MF

Mobile Forces

333networks

UT2K4

Unreal Tournament 2004

333networks · OpenSpy

UT2K3

Unreal Tournament 2003

OpenSpy

GameSpy (v1)

SS

Serious Sam: The First Encounter

333networks

SS2

Serious Sam: The Second Encounter

333networks · OpenSpy

NOLF

No One Lives Forever

OpenSpy

NOLF2

No One Lives Forever 2

OpenSpy

H2

Heretic II

333networks · OpenSpy

Gore

Gore

OpenSpy

DR

Drakan: Order of the Flame

333networks

T2

Turok 2: Seeds of Evil

333networks

GlOps

Global Operations

333networks · OpenSpy

VC

Vietcong

OpenSpy

BC

Star Trek: Bridge Commander

OpenSpy

MoH

Medal of Honor: Allied Assault

333networks · OpenSpy

MoHS

Medal of Honor: Allied Assault Spearhead

333networks · OpenSpy

MoHB

Medal of Honor: Allied Assault Breakthrough

333networks · OpenSpy

BF

Battlefield 1942

OpenSpy

SoF

Soldier of Fortune

333networks · errorist · OpenSpy

GameSpy v2 and v3

BF2

Battlefield 2

OpenSpy · battlefield2.ms.playbf2.ru

BFV

Battlefield Vietnam

OpenSpy

Halo

Halo: Combat Evolved

s1.master.hosthpc.com

HCE

Halo: Custom Edition

s1.master.hosthpc.com

SWAT

SWAT 4

master.swat4stats.com · OpenSpy

T:V

Tribes: Vengeance

OpenSpy

FEAR

F.E.A.R.

OpenSpy

SWBF

Star Wars: Battlefront

OpenSpy

Doom 3 engine

D3

DOOM 3

idnet.ua-corp.com

Q4

Quake 4

q4master.idsoftware.com

Their own protocols

T1

Starsiege: Tribes

t1m1.tribes1.co · t1m1.pu.net

T2

Tribes 2

TribesNext list

SAV

Savage: The Battle for Newerth

Savage DRX list

RVS

Rainbow Six 3: Raven Shield

OpenRVS list

GR

Ghost Recon

Add server · LAN

GRD

Ghost Recon Demo

Add server · LAN

SOAF

The Sum of All Fears

Add server · LAN

SOAFD

The Sum of All Fears Demo

Add server · LAN

Multi Theft Auto

MTA

Multi Theft Auto: San Andreas

master.multitheftauto.com

Loadout

Everything ASE did. Then some.

No ads, no account, no tracking. Just the tool you remember, written in fast native Rust.

Ping. Flux. PL.

Every server is pinged several times. You get the average, how much it jumps around and how many packets got lost. Pick the server that won't rubber-band.

17ping
±1flux
0%PL

The Tree

Game types as folders. Tick Mods, Maps, Kill Cam, PunkBuster, country. Build your own filters and color filters.

Double-click. Frag.

OpenASE launches the game with the right mod, your name and the password. Enter works too.

Where are my mates?

Friends tracked on every server you scan, in groups, with a ping when one starts playing. Find any player in a second.

Location

Country for every server and a country filter, from a free monthly GeoIP database. Play where the ping is.

LAN party mode

Special > LAN servers broadcasts on your network and lists every game server it hears. Plug in, play.

Favorites ×8

Favorites1 to 8 like the old days, recently joined, recently added, import and export server lists and your whole profile.

Auto-Search

Finds your installed games in the registry, Steam folders or a full disk sweep. Then it just works.

English & French

The whole interface comes in English and French. Options > General > Language, or let it follow your system.

Make it yours

Pick your toolbar buttons and the colors of the server list, with Quake color codes on or off. Options > Toolbar and Colors.

A sound per friend

Give each friend their own sound: the default one, none, or a .wav file (.wav playback is Windows-only).

Respawn

The servers never left.

The browser did. Thousands of servers are still up, run by communities that never stopped playing.

200X

The All-Seeing Eye arrives. Every clan, every LAN party, every late night starts with its server list.

2004

Yahoo buys it. The masters go dark one by one, and the Eye slowly closes.

2026

OpenASE. Open source, live community masters, native and fast. The Eye opens again, for good this time.

RTFM

The manual.

Two minutes and you're in. Press F1 in OpenASE to land here.

Quick start

  1. Download the package for your system (Windows, Linux or macOS), unzip, run OpenASE. The setup wizard asks for your connection and your name.
  2. Click a game in the tree. OpenASE downloads the list and pings everything.
  3. Sort by Ping, tick filters (game type, mods, maps, Kill Cam, country...).
  4. Double-click a server, or press Enter. The game starts and connects.
  5. No game path yet? Tools > Options > Games > Auto-Search.

Keys

F5Refresh the selected game or list
EnterJoin the selected server
Ctrl+EShow the selected server
Ctrl+DClear every filter
Ctrl+QCollapse the whole tree
F1This manual

Friends & lists

  • Friends > Add friend: name (colors ignored, partial match), game, group Friends1 to 4.
  • In the Friends window each friend can have a sound: default, none or a .wav file (.wav playback is Windows-only).
  • Right-click a server: join, refresh, favorite, add to Favorites1 to 8, copy address.
  • File > Import server list reads any text with ip:port entries.
  • File > Export user profile saves everything to one JSON file.

Good to know

  • Ping average round-trip, Flux its variation, PL lost packets.
  • Filter > New filter builds rules like players greater than 4. Tick “color filter” to highlight matches everywhere.
  • The Half-Life and Source game lists (Counter-Strike, Team Fortress Classic, Day of Defeat, Half-Life 2: Deathmatch and more) need your free Steam Web API key in Options > General.
  • Options > General > Language switches between English and French; "System" follows your OS.
  • Options > Toolbar (or right-click the toolbar) chooses the toolbar buttons. Options > Colors sets the list background, alternating rows, selection and text, and turns Quake color codes on or off.
  • Ghost Recon and The Sum of All Fears have no master server left: add their servers with Add server, or find them on your LAN.
  • The Join command of many newer games is not tested with the game installed yet (issue 1).
  • Settings live in %APPDATA%\OpenASE.

Build it yourself

Compile & play.

# Windows, Linux, macOS · Rust 1.88+
$ git clone https://github.com/tsautier/OpenASE
$ cd OpenASE/rust
$ cargo run --release
# no GUI, straight to the point
$ cargo run --example scan -- cod2 20
$ cargo run --example query -- ut99 1.2.3.4:7778
$ cargo test

FAQ

Questions & answers.

Is this the original All-Seeing Eye?

No. OpenASE is new code written from scratch, inspired by the original. It contains nothing from the Yahoo program and is not affiliated with Yahoo or the original authors.

Is it free? Any ads, accounts or tracking?

Free software under the GPL-3.0. No ads, no account. OpenASE talks to game master servers and game servers, downloads the DB-IP country database once a month (can be turned off) and checks GitHub for a new release (can be turned off). That's it.

Why do the Half-Life and Source games need a Steam key?

Valve shut down the old UDP master for the Half-Life games, and the Source games (Counter-Strike: Source, Day of Defeat: Source, Half-Life 2: Deathmatch) never used it. The server list now comes from the Steam Web API, which needs a free personal key. Servers you add by hand work without one.

Linux? macOS?

Yes. Every release ships Windows, Linux (x64, AppImage or archive) and macOS (universal, Apple Silicon and Intel) builds, all tested in CI. On macOS the app is not notarized yet: right-click it and choose Open the first time. Your games still need to run on your system: ioquake3, Urban Terror, OpenArena, ET: Legacy, UT99 (OldUnreal) and CS 1.6 have native versions; Call of Duty needs Windows or Wine / Proton.

My game is missing.

Games live in one JSON file. If yours speaks the Quake 3, GameSpy or Valve query protocol and still has a live master, it is often a few lines. Open an issue on GitHub.