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Delta Particles
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Delta Particles is a single-player, story-driven, total conversion modification for Half-Life 1. Features include a new single-player campaign consisting of 4 chapters, total conversion, a lot of new content, the atmosphere of the new scientific complex "Delta Base", new weapons, a new Dark Ambient soundtrack and a BlueShift-style XEN level.
PC (Microsoft Windows) · Oct 27, 2021
Worldwide · Exact date · Full release · IGDB
Linux · Dec 31, 2023
Worldwide · Exact date · Full release · IGDB
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Main game
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53 achievements available.
Finish the campaign.
LockedSteam
Survive the Xen arena without using the healing pool.
LockedSteam
Kill the bullsquid before it gets into the hurricane.
LockedSteam
Enter the portal.
LockedSteam
Behead 25 enemies.
LockedSteam
Destroy 25 Xen Trees.
LockedSteam
Finish the game on hard difficulty.
LockedSteam
Save the security officer from three zombies in the lab.
LockedSteam
Enter the barricaded room against the scientist's advice.
LockedSteam
Drink 25 soda cans.
LockedSteam
Diana equipped a protection suit.
LockedSteam
Destroy all alien hives in Xen.
LockedSteam
Take a trip on the monorail train.
LockedSteam
Prevent security officer from listening to music.
LockedSteam
Hidden until unlockedSteam
Save the scientist from zombie in the lab.
LockedSteam
Kill the headcrab inside the healing pod.
LockedSteam
Kill six enemies in a row with a single clip from your revolver without changing weapons.
LockedSteam
Find Diana in the tunnels.
LockedSteam
It seems you've been robbed of something valuable.
LockedSteam
Turn off the light and leave the basement.
LockedSteam
Behead a zombie using the pipe wrench.
LockedSteam
Kill two enemies with the Light Gun in one shot.
LockedSteam
Get through the place after parking without destroying an enemy SUV.
LockedSteam
Get additional points of armor from the technician three times.
LockedSteam
Destroy one Robotic Infantry unit with a melee weapon.
LockedSteam
Finish the game on medium difficulty.
LockedSteam
Behead 125 enemies.
LockedSteam
Hidden until unlockedSteam
Hidden until unlockedSteam
Get the cargo down to the railcar.
LockedSteam
Meet Diana after the disaster.
LockedSteam
Demolish the jammed door.
LockedSteam
Destroy 10 Xen Trees.
LockedSteam
Equip a protection suit.
LockedSteam
Find a shotgun early.
LockedSteam
Behead 60 enemies.
LockedSteam
Activate the guard robot at the robot factory.
LockedSteam
Hidden until unlockedSteam
Transmit a SOS signal from the helipad.
LockedSteam
Stabilize the power generator.
LockedSteam
Kill three alien controllers with the under-barrel grenade launcher.
LockedSteam
Pick up a silencer for SMG.
LockedSteam
Hidden until unlockedSteam
Unlock all rooms with supplies inside.
LockedSteam
Visit a rotating radioactive asteroid.
LockedSteam
Dump the chemicals.
LockedSteam
Hidden until unlockedSteam
Find yourself in the alien world.
LockedSteam
Turn on the power and open the fence door without killing Garg.
LockedSteam
Kill five headcrabs with the sniper rifle.
LockedSteam
Turn on emergency power supply after the disaster.
LockedSteam
Hidden until unlockedSteam
Community notes
