Here is the full list of all 15 JYDGE achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Find all collectibles.
Upgrade four special weapons to max.
Upgrade four Gavel firemodes to the max.
Purchase all weapon mods.
Purchase all cyberware.
Get all medals for all missions of the Acts on Nightmare difficulty.
Complete the game as the hero of the citizens.
Get all medals for all missions of the Acts on Grim difficulty.
Get all medals for all missions of the Acts on Hardcore difficulty.
Get all medals for all missions of the Acts on Normal difficulty.
Complete the third act.
Complete the second act.
Rescue 50 Citizens.
Get three medals in any mission in one difficulty.
Complete the first act.