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Delta Particles

Wishlist Follow Ignore Install Unwatch Watch
App ID 1707900
App Type Game
Developer
Publisher Yuri Epifantsev
Supported Systems Windows Linux
Technologies GoldSource Engine
Last Changenumber 30740752
Last Record Update 23 August 2025 – 00:05:17 UTC ()
Release Date 20 December 2024 – 11:13:57 UTC ()
😍 91.26%
1k reviews
16
In-Game
💥 Action 🔫 FPS 🔫 Shooter 🔧 Mod 🧊 3D

Delta Particles – is a total conversion mod for HL. You're playing as a technical engineer of complex "Delta Base" Nick Farrell. Unfortunately, the protagonist was in the wrong place at the wrong time, as an experiment at the Black Mesa Research Facility resulted in a resonance cascade.

Additional Information

This game is excluded from Steam Family Sharing because: Free Game

Developer Yuri Epifantsev
controller_support full
community_visible_stats Yes
RequiredAppID Half-Life (70)
ReleaseState released
Publisher Yuri Epifantsev
IsFreeApp Yes
Exclude from family sharing (exfgls) 3 (Free Game)
Store Release Date 20 December 2024 – 11:13:57 UTC ()
osarch empty string
community_hub_visible Yes
Social Media https://discord.gg/P4VGw3vvvF
https://www.youtube.com/@hldeltacreator/
Primary Genre Action (1)
Store Genres Action (1), Indie (23)
Steam Release Date 20 December 2024 – 11:13:57 UTC ()
Store Asset Modification Time 13 July 2025 – 20:23:27 UTC () (1752438207)
library_assets
library_capsuleen
library_heroen
library_logoen
library_headeren
logo_position ↴
pinned_positionBottomLeft
width_pct61.90997749437361
height_pct99.24008549038234
osextended empty string
Is free on the store? Yes
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
  • Some in-game text is small and may be difficult to read
  • This game's default graphics configuration performs well on Steam Deck
  • Note: This game does not default to external Bluetooth/USB controllers on Deck, and may require manually switching the active controller via the Quick Access Menu
  •  
  • SteamOS:
  • This game runs successfully on SteamOS
  • Note: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  • Note: This game does not default to external Bluetooth/USB controllers on SteamOS, and may require manually switching the active controller via the Quick Access Menu
  •  
  • category: Playable
  • steamos_compatibility: Compatible
  • test_timestamp: 16 August 2025 – 00:00:00 UTC
  • tested_build_id: 16812629
  • configuration:
    supported_inputgamepad
    requires_manual_keyboard_invoke0
    requires_non_controller_launcher_nav0
    primary_player_is_controller_slot_01
    non_deck_display_glyphs0
    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)
controllertagwizard Yes
First seen on SteamDB 26 July 2021 – 17:02:14 UTC (), in changelist #12124752
Content Descriptors (Including DLC) Frequent Violence or Gore (2), General Mature Content (5)

Supported Languages

5 Languages Interface Full Audio Subtitles Achievements
English Yes Yes Yes Yes
Russian Yes Yes Yes Yes
Spanish - Spain Yes Yes Yes
Portuguese - Brazil Yes Yes Yes
Simplified Chinese Yes Yes Yes

Tags

💥 Action 🌱 Indie 🔫 FPS 🔫 Shooter 🔧 Mod 🧊 3D 🙌 First-Person 😖 Gore 🚀 Sci-fi 📏 Linear 🌫 Atmospheric 👤 Singleplayer 🕹️ Old School 😨 Dark 🆓 Free to Play

Categories

Single-player Steam Achievements Steam Cloud Profile Features Limited

Hardware Categories

Full Controller Support DualShock Controllers (USB Only) DualShock Controllers DualSense Controllers (USB Only) DualSense Controllers

Assets

Load all asset images
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small_capsule
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header_image
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library_assets_full
library_capsule ↴
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image2x/english23ba023c24a4d9c28d4606a146f0a8aa8bfdf926/library_600x900_2x.jpg
library_hero ↴
image/englishlibrary_hero.jpg
library_logo ↴
image/englishlogo.png
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logo_position/height_pct99.24008549038234
library_header ↴
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image2x/englishe587a4458b6f123ec5a483044471c64e55d90c72/library_header_2x.jpg
Assets
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library_capsule23ba023c24a4d9c28d4606a146f0a8aa8bfdf926/library_600x900.jpg
library_capsule_2x23ba023c24a4d9c28d4606a146f0a8aa8bfdf926/library_600x900_2x.jpg
library_herolibrary_hero.jpg
community_icon0345070e5d8af9ee5e21b5d8ac79a1a673a2d029.jpg
page_background_pathapp/1707900
raw_page_backgroundpage_bg_raw.jpg
timestamp13 July 2025 – 20:23:35 UTC
Trailers
257066909 ↴
trailer_nameGameplay Trailer
trailer_category1
trailer_480p/video/webm257066909/movie480_vp9.webm
trailer_480p/video/mp4257066909/movie480.mp4
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trailer_max/video/mp4257066909/movie_max.mp4
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microtrailer/video/mp41707900/774613/f0f36fe9d6c6f06b4960a5cb0816e0fdeb27efbf/1751022091/microtrailer.mp4
screenshot_medium257066909/a1edaa7a973c2e472750bb7c04ab16007840f598/movie_600x337.jpg
screenshot_full257066909/a1edaa7a973c2e472750bb7c04ab16007840f598/movie_full.jpg
trailer_base_id774613
all_agestrue
is_highlighttrue
timestamp1732608112

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