Abandoned Cellar Level 4
From Neocron Wiki
The Abandoned Cellar Level 4 (Nickname Aggie cellars) can be accessed from Plaza Sector 1 next to the steps, near the Diamond Real Estate Shop. Another entrance can be found in Plaza Sector 2 opposite Archer & Wesson.
They consist of series of rooms linked by closing doors full of boxes with trash loot as well as the area's trademark Aggressor and Aggressor Captain mutants.
Often considered the best place for starting characters to gain levels, there are kill quests available for Aggressors and they drop trash loot that is good for cloning ammunition using recycling.
The Aggressors do primarily piercing damage.