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Redid electrical SFX; zap files now use HLA sounds, and both spark and newspark use ME3 sounds. electro sound effects replaced with HLA heavy arcs to replace upscaled Goldsource era sounds.
Replaced a few unfitting ambient files with better alternatives.
Redid ignite sound effect.
Reconfigured combine shield sounds; now properly laid out with variants matching HL2's intensity.

Electrical sounds fully replaced with SFX from Mass Effect 3.
Machinery/computer sounds adjusted for proper levels of sci-fi.
More weapon sounds tweaked or fully replaced.
Emplacement and vehicle sounds, first pass of Mass Effect/generic sci-fi replacements.
Flashlight sound replaced with my own remake of ME3's flashlight sound.
Halo Energy Shield recharge and break sounds replaced with SFX from Mass Effect 3.
UI sounds tweaked.
Isolated Mass Effect sounds added in sound\masseffect\ambient, sound\masseffect\music and sound\masseffect\reaper folders.

Tweaked USG Horizon sounds.
Tweaked button sounds.
Added some sound replacements for various Mass Effect NPCs on the workshop to match weapon packs and other replacements. Work in progress.

Tweaked HL1 suit 'bell' used by roleplay schemas for PMs.
Tweaked some addon sounds to better match others for consistency.
Tweaked some sounds from the 'USG Horizon' Dead Space RP map to be 'Mass Effect-ified'.

Updated various ambience. Added ME3 ambience files for server player use.
Updated metal and concrete footsteps with sounds from ME1.
Overhauled some sounds from Darken's Sci Fi Weapons pack.
Replaced Combine Gunship sounds with A-61 Gunship sounds from ME2.
Replaced klaxon1 with an alarm sound from ME2.
Physics touchups.

Added new alarm sounds.
Replaced aircraft and vehicle sounds for generic sci fi or Mass Effect alternatives.
Overhauled physics and footsteps sounds.
Overhauled ambient/atmosphere stragglers.
Replaced keyboard sounds for Mass Effect alternatives.

Initial addon creation.
Primarily buttons, major ambience, footsteps, and some misc files.