I've recently started a D&D 5th edition game set in "The Keep on the Borderlands". In previous adventures the party explored "The Cave of the Unknown" where they made a pact with a Bugbear and cleared an ancient monastery which was the final resting place of a Wight and several skeletons. After that they fought animated armors and giant spiders in "The Tomb of Ballanor". They then set out of the "Caves of Chaos" to rescue two citizens of the keep who had been kidnapped by Kobolds.
The heroes belong to a mercenary company named "The White Stag Keep Irregulars". Their company specializes in dealing with monstrous threats in their own lairs. Basically they are a company of dungeoneers.
When they returned to the main corridor they discovered even more Kobolds waiting for them. This time they even had a couple of archers.
As they pressed on the party found a large common room with several sleeping pallets laid out on the floor. There were over a dozen Kobolds in the room who were ready and waiting for them.
Searching the Kobold's food storage room they found Old Gregori and Sasha locked in a large crate. Anton pried the crate open with a crowbar and they decided to escort the prisoners back to the Keep before returning to finish off the remaining Kobolds.
Back at the Keep they ran into Hedge Ironfist a Dwarf they had freed while exploring the Cave of the Unknown. Hedge agreed to accompany them back to the Kobolds lair for a share of the loot. When they got their they began to make their way down a corridor they had not yet explored when they were attacked by four Kobold archers hiding behind a barrel barricade. Brigga and Anton quickly dispatched two of them with crossbow and hatchets and then closed on the others. They managed to kill the remaining creatures easily.
Finally they came across the chambers of the Kobold chief. The door was locked by Brigga managed to kick it in with a mighty display of strength. The chief and his two mistresses were ready for them. Anton took an bolt as they entered the room and the chief sprung out of the corner and attacked Brigga.
Anton rushed the chief's mistresses while the others attacked the chief. Although he managed to dispatch them one of the Kobolds managed to give him a nasty wound.
The party managed to save the kidnapped prisoners and walk away with a modest treasure.