D&D Underdeep Encounter Tables
Random encounter tables for D&D 5e underdeep scenes. Five dice tiers, 2,900 total scenarios — pick a tier below. Every scenario is system-neutral so it works equally well with the 2014 Player's Handbook and the 2024 D&D revision.
Single-roll scenarios. Roll d100 in the underdeep and get an instant scene.
Roll the underdeep d1 table →100 sets × 4 expansions each. Use when you want a small choice tree at the underdeep.
Roll the underdeep d4 table →100 sets × 6 expansions. Mid-depth table for the underdeep.
Roll the underdeep d6 table →100 sets × 8 expansions. Deep table for underdeep regulars.
Roll the underdeep d8 table →100 sets × 10 expansions. Deepest underdeep table — campaign-length material.
Roll the underdeep d10 table →How to run a underdeep encounter in D&D 5e
When your party enters a underdeep, give them one round of looking around (a free passive Perception check), then roll on the table below. For combat encounters, pair the scenario with a stat block from Doungim's D&D monster catalogue — over 3,000 monsters indexed by challenge rating. For role-play encounters, grab a pre-built NPC and read the scenario to your players.
The d1 table is best for quick interludes between major dungeon scenes. The d10 table is for campaigns where the underdeep is recurring — sessions in Waterdeep for instance, or a long-running tavern HQ.