List of Half-Life 1 Mods taking place during the Black Mesa Incident/Resonance Cascade.

[wadmodder1999]

With Half-Life easily accessible SDK tools, many people have made thousands of mods, with a few that have yet to be released. Many are single-player maps that take place in their own universe while others are just multiplayer mods made to experiment extra game modes beyond Deathmatch. This also includes a couple that take place in the story of Half-Life 1 albeit in a non-canon way, featuring new fan-created characters with many maps being modified from Half-Life 1, Opposing Force, Blue Shift and even Decay in most instances. With that in mind, I've compiled a list of Mods that take place during the Black Mesa Incident/Resonance Cascade which was the plot of Half-Life 1, and its expansions Opposing Force, Blue Shift and the PS2-exclusive Decay (which was also unofficially Ported to PC)

List of Mods:

Induction
Half Life Echoes
Azure Sheep
Focal Point
Half Life Uplinked
Brave Brain
Bootleg Squadrog
Half Life Life's End
Military Duty
A Soldier's Tale
Half-life Escape 1 & 2
Help Wanted
Half-Life Decay: Solo Mission
Operation Nova
Escape from Black Mesa (Unfinished)
HLFX: Lost in Black Mesa
Engineer Adventure (Demo)
Cleaners Adventure
Fight for Life
Under The Black Moon
Black Death
Half-Life Visitors
Sweet Half-Life
Half-Life: Zombie Edition
Zombie Edition: Residual Agent
Anti-Climax
Half-Life: Invasion
Deliverance
Shift-Two
Point of View
Case Closed
Half-Secret
Xen Warrior
Ultimate Attack
Black Mesa Sideline
Alternative Origin
Field Intensity
Residual Life
Residual Point
HTC (Hunt the ♥♥♥♥)
Operation: Sandblast
The Infected
The Evasion
Operation Rosenberg
Black Guard
The Alpha Unit

This is a big list that I've compiled for those who want to search for them. If you know of any other Mods that I've missed, let me know about this.