Gangs or "Hanza" (from the Nilfgaardian term "aen hanse") tend to be para-military or mercenary groups, usually bound by familial ties, friendship or a common goal. There are several such examples in the Witcher saga:
- Geralt's hanza
- Koshchey's Men
- the Nightingale gang
- the Nissir gang
- the Rats
- Renfri's band
- the Trappers