Many experienced Game Masters know the key to tension is the right touch of paranoia. The right description and setting can establish the right mood and put the players on edge. This can allow you to set up other encounters or drop hints from your campaign setting. Such encounters may just be red herrings intended to throw characters off the trail or to make them think. Couple these descriptive moments with noncombat elements and a group puzzle might challenge the characters in a way they were not expecting.
Encounter Type: Puzzle and social
Map: Trail encounter map
Lighting: None (flat battle map.)
System: 5E
Length: One shot
Installation Type: Addon
License: Roll20 End User License Agreement
(Personal Use Only, Do Not Distribute)