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Half-Life: Opposing Force cover
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Half-Life: Opposing Force

Steam Player Count & Twitch Viewers / Streams
// updated 14 min ago
Steam Players
73
-10 // vs 7d ago
73 // 24 hr peak
Twitch Viewers
89
+87 // vs 7d ago
91 // 24 hr peak
Twitch Streams
1
0 // vs 7d ago
1 // 24 hr peak
Date Steam Players Twitch Viewers
Aug 237368
Aug 228518
Aug 218911
Aug 20632
Aug 19863
Aug 185713
Aug 17711

Summary

Half-Life: Opposing Force currently has 89 live Twitch viewers across 1 active streams, with viewership up 87 compared to the same time last week.

On Steam, it currently has 73 concurrent players, down 10 compared to the same time last week.

Over the 8 months we've tracked it, Half-Life: Opposing Force's Steam players peaked at 270 and Twitch viewers peaked at 604.

Half-Life: Opposing Force monthly player & viewer history

Month Steam AvgSteam Peak Twitch AvgTwitch Peak
Aug 2026
month to date
78
▼ -28
107
11
▲ +4
219
Jul 2026
106
▲ +20
139
7
▼ -4
118
Jun 2026
86
▲ +7
115
11
—
329
May 2026
79
▼ -6
105
11
▼ -3
214
Apr 2026
85
▼ -3
112
14
▲ +8
604
Mar 2026
88
▼ -1
125
6
▼ -10
89
Feb 2026
89
▼ -38
165
16
▲ +4
200
Jan 2026
127
—
270
12
—
242

Monthly averages and peak concurrent Steam players and Twitch viewers, since we began tracking Half-Life: Opposing Force.

About

Opposing Force returns to the same setting as Half-Life, but instead portrays the events from the perspective of a U.S. Marine, one of the enemy characters in the original game. The player character, Adrian Shephard, is sent in to neutralize the Black Mesa Research Facility after a scientific mishap causes it to be invaded by aliens, but quickly finds that the Marines are outnumbered and slowly being beaten back by a second alien race and black operations units.

Genres
ShooterPlatformPuzzle
Platforms
LinuxPC (Microsoft Windows)Mac
Developer
Gearbox Software
Publisher
Sierra Entertainment, Valve
Release Date
November 10, 1999
Game Modes
Single playerMultiplayer
Perspective
First person
Themes
ActionScience fictionThrillerWarfare

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