Also commonly known as Ratmen.

• Skrak

A Ratfolk woman (and pack) are encountered in Bogroot Swamp;

You…spy a Ratfolk woman eyeing you nervously from the top of a rise in the rootpath. The woman holds a small knife and a wide metal bowl. - Tome of Encounters (RPA-ADV6)

Three Ratfolk archers fire at you from three different directions in the Colosseum of Ashes;

Three Ratfolk enter the arena: one through the northern gate, one through the southern gate, and one from the east. They immediately have you surrounded. Each aims a crossbow at your head as they march forward toward the center of the arena. - Tome of Encounters (RPA-Tome-SQ1-146)

• You beat the odds and defeat them all handily.
• Despite the loss, the match is still counted in your favor due to the unfair advantage.

If you have previously sided with Yonlok, a group of Ratmen will attempt to recruit you into their group. They plan to burn down the League of Inventor's guildhall in Sabek. - Explorer's Guide (GS-Guide-ADV2-5)

• Assist them with the plans.
  • Create a diversion.
  • Attack the Construct guards.
• Refuse to help them.
  • Manage to scare them off.
  • They carry out their plans without you.

If you instead had previously attacked Yonlok, the group of Ratmen become violent with you. - Explorer's Guide (GS-Guide-ADV2-6)

• Manage to scare them off.
• They carry out their plans without you.