Here is the full list of all 15 JYDGE achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.
Upgrade four Gavel firemodes to the max.
Upgrade four special weapons to max.
Purchase all cyberware.
Purchase all weapon mods.
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.
Complete the first act.
Get three medals in any mission in one 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 Nightmare difficulty.
Find all collectibles.