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Delta Particles

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App ID 1707900
App Type Game
Developer
Publisher Yuri Epifantsev
Supported Systems Windows Linux
Technologies GoldSource Engine
Last Changenumber 31222600
Last Record Update 20 September 2025 – 23:39:42 UTC ()
Release Date 20 December 2024 – 11:13:57 UTC ()
😍 91.74%
2k reviews
26
In-Game
💥 Action 🔫 FPS 🔧 Mod 🔫 Shooter 🧊 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 96
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 🔧 Mod 🔫 Shooter 🧊 3D 🙌 First-Person 😖 Gore 🚀 Sci-fi 📏 Linear 🌫 Atmospheric 🕹️ Old School 👤 Singleplayer 😨 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
clienticon 382a376c69600ca78462f99f837ae7e3c8599206
clienttga 4da37304ee332c52f0f2cde62f490d8456b3d309
icon 0345070e5d8af9ee5e21b5d8ac79a1a673a2d029
logo c68a7d360dbd121988ad03801f45509793a25552
logo_small c68a7d360dbd121988ad03801f45509793a25552_thumb
LinuxClientIcon 2ecfc326589f5413a85b3fcf23793dcb71a2ee0b
small_capsule
englishdbf30229d446af7cce566c07f760edc3317b6385/capsule_231x87.jpg
header_image
englishheader.jpg
library_assets_full
library_capsule ↴
image/english23ba023c24a4d9c28d4606a146f0a8aa8bfdf926/library_600x900.jpg
image2x/english23ba023c24a4d9c28d4606a146f0a8aa8bfdf926/library_600x900_2x.jpg
library_hero ↴
image/englishlibrary_hero.jpg
library_logo ↴
image/englishlogo.png
image2x/englishlogo_2x.png
logo_position/pinned_positionBottomLeft
logo_position/width_pct61.90997749437361
logo_position/height_pct99.24008549038234
library_header ↴
image/englishe587a4458b6f123ec5a483044471c64e55d90c72/library_header.jpg
image2x/englishe587a4458b6f123ec5a483044471c64e55d90c72/library_header_2x.jpg
Assets
main_capsulefde8f482bf24ec2d2c8690b865ce4163789a68c4/capsule_616x353.jpg
small_capsuledbf30229d446af7cce566c07f760edc3317b6385/capsule_231x87.jpg
headerheader.jpg
page_backgroundpage_bg_generated_v6b.jpg
hero_capsule493f77fd961677d858569395d98a6a60411daa5e/hero_capsule.jpg
hero_capsule_2x493f77fd961677d858569395d98a6a60411daa5e/hero_capsule_2x.jpg
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
774613 ↴
trailer_nameGameplay Trailer
trailer_category1
trailer_480p/video/webm257066909/movie480_vp9.webm
trailer_480p/video/mp4257066909/movie480.mp4
trailer_max/video/webm257066909/movie_max_vp9.webm
trailer_max/video/mp4257066909/movie_max.mp4
microtrailer/video/webm1707900/774613/f0f36fe9d6c6f06b4960a5cb0816e0fdeb27efbf/1751022091/microtrailer.webm
microtrailer/video/mp41707900/774613/f0f36fe9d6c6f06b4960a5cb0816e0fdeb27efbf/1751022091/microtrailer.mp4
adaptive_trailers/0/cdn_path1707900/774613/f0f36fe9d6c6f06b4960a5cb0816e0fdeb27efbf/1751022091/dash_av1.mpd
adaptive_trailers/0/encodingdash_av1
adaptive_trailers/1/cdn_path1707900/774613/f0f36fe9d6c6f06b4960a5cb0816e0fdeb27efbf/1751022091/dash_h264.mpd
adaptive_trailers/1/encodingdash_h264
adaptive_trailers/2/cdn_path1707900/774613/f0f36fe9d6c6f06b4960a5cb0816e0fdeb27efbf/1751022091/hls_264_master.m3u8
adaptive_trailers/2/encodinghls_h264
screenshot_medium257066909/a1edaa7a973c2e472750bb7c04ab16007840f598/movie_600x337.jpg
screenshot_full257066909/a1edaa7a973c2e472750bb7c04ab16007840f598/movie_full.jpg
all_agestrue
is_highlighttrue
timestamp1732608112

User File System

Key Value
quota 38.15 MiB (40000000)
maxnumfiles 35
savefiles
0 ↴
rootgameinstall
pathdelta_particles/SAVE
pattern*.*
recursive1
1 ↴
rootgameinstall
pathdelta_particles
pattern*.cfg

Save File Locations

Based on the configuration above, this is where we think the save files are located.

Read more about cloud saves in Steamworks documentation.

Platform Path Pattern
[All OSes] [Steam Library]/steamapps/common/Delta Particles/delta_particles/SAVE *.*
[All OSes] [Steam Library]/steamapps/common/Delta Particles/delta_particles *.cfg
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