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Half-Life: Opposing Force

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App ID 50
App Type Game
Developer
Publisher Valve
Franchise Half-Life
Supported Systems Windows macOS Linux
Technologies GoldSource Engine
Last Changenumber 28969249
Last Record Update 13 May 2025 – 22:20:27 UTC ()
Release Date 1 November 1999 – 08:00:00 UTC ()
😍 93.18%
25k reviews
86
In-Game

Return to the Black Mesa Research Facility as one of the military specialists assigned to eliminate Gordon Freeman. Experience an entirely new episode of single player action. Meet fierce alien opponents, and experiment with new weaponry. Named 'Game of the Year' by the Academy of Interactive Arts and Sciences.

Additional Information

Developer Gearbox Software
gamedir gearbox
metacritic_name Half-Life: Opposing Force
icon steam/games/icon_opfor
icon2 steam/games/icon_opfor_dull
primarycache 51
dependantOnApp Half-Life (70)
serverbrowsername Opposing Force
vacmacmodulecache SteamDB Unknown App 160 [UNPUBLISHED]
vacmodulecache SteamDB Unknown App 202 [UNPUBLISHED]
vacmodulefilename sourceinit.dat
hdaddon SteamDB Unknown App 96 [UNPUBLISHED]
developer_url http://www.gearboxsoftware.com
Publisher Valve
Store Release Date 1 November 1999 – 08:00:00 UTC ()
community_hub_visible Yes
Primary Genre Action (1)
Store Genres Action (1)
Steam Release Date 1 November 1999 – 08:00:00 UTC ()
Store Asset Modification Time 23 April 2025 – 00:35:37 UTC () (1745368537)
library_assets
library_capsuleen
library_heroen
library_logoen
logo_position ↴
pinned_positionCenterCenter
width_pct42.2205438066465
height_pct89.23611111111111
review_score 9
review_percentage 95
Detected Technologies (?) GoldSource Engine, CEF SDK, Miles_Sound_System SDK, SDL SDK
Steam Deck Compatibility
  • Steam Deck:
  • Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  • This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
  • Entering some text requires manually invoking the on-screen keyboard
  • Some in-game text is small and may be difficult to read
  • This game doesn't support Steam Deck's native display resolution and may experience degraded performance
  • This game's default graphics configuration performs well on Steam Deck
  •  
  • SteamOS:
  • This game runs successfully on SteamOS
  • Note: Entering some text requires manually invoking the on-screen keyboard
  • Note: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  •  
  • category: Playable
  • steamos_compatibility: Compatible
  • test_timestamp: 13 May 2022 – 00:00:00 UTC
  • tested_build_id: 5429885
  • configuration:
    supported_inputgamepad
    requires_manual_keyboard_invoke1
    requires_non_controller_launcher_nav0
    primary_player_is_controller_slot_00
    non_deck_display_glyphs1
    small_text1
    requires_internet_for_setup0
    requires_internet_for_singleplayer0
    recommended_runtimenative
    requires_h2640
    requires_voice_files0
    gamescope_frame_limiter_not_supported0
    hdr_support0
Content Descriptors Frequent Violence or Gore (2), General Mature Content (5)
Anti-Cheat Software VAC (Valve Anti-Cheat)
First seen on SteamDB 29 March 2013 – 23:26:04 UTC (), in changelist #200805
Content Descriptors (Including DLC) Frequent Violence or Gore (2), General Mature Content (5)

Supported Languages

4 Languages Interface Full Audio Subtitles
English Yes
French Yes
German Yes
Korean Yes

Tags

🔫 FPS 💥 Action 🕒 Classic 🚀 Sci-fi 👤 Singleplayer 🔫 Shooter 🙌 First-Person 👽 Aliens 📼 1990's 🗺️ Adventure 🌫 Atmospheric 🪖 Military 📚 Story Rich 🔇 Silent Protagonist 🎶 Great Soundtrack 😖 Gore 🧩 Puzzle 🛠️ Moddable 👾 Retro 🤝 Co-op

Categories

Single-player Family Sharing Multi-player Valve Anti-Cheat

Accessibility Categories

Custom Volume Controls Playable without Timed Input Adjustable Difficulty Save Anytime

Assets

Load all asset images
clienticon 19695f5ff11ac7a47b084e62361f212e6265a17a
clienttga 923fdd6a256fa0d588182a0afb63f85d84065497
icon 04e81206c10e12416908c72c5f22aad411b3aeef
logo bb696ddfd8f8ef0892d5f2154d8617528d3cc2ec
logo_small 0eaf8c7ccd56d8a8014cdd1747e0709da94c7a8f
clienticns 4641d7403217eab3dc8ef1c3ca5f72c075db6bda
LinuxClientIcon 1d109108ef9d9b427ae1c1f838a59c0f5ca29f4c
small_capsule
englishcapsule_231x87.jpg
header_image
englishheader.jpg
library_assets_full
library_capsule ↴
image/englishlibrary_600x900.jpg
image2x/englishlibrary_600x900_2x.jpg
library_hero ↴
image/englishlibrary_hero.jpg
library_logo ↴
image/englishlogo.png
logo_position/pinned_positionCenterCenter
logo_position/width_pct42.2205438066465
logo_position/height_pct89.23611111111111
Assets
main_capsulecapsule_616x353.jpg
small_capsulecapsule_231x87.jpg
headerheader.jpg
library_capsulelibrary_600x900.jpg
library_capsule_2xlibrary_600x900_2x.jpg
library_herolibrary_hero.jpg
community_icon04e81206c10e12416908c72c5f22aad411b3aeef.jpg
page_background_pathapp/50
timestamp23 April 2025 – 00:35:39 UTC

History

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