Inquisitive (Rogue Subclass)

This an an adaptation of the Inquisitive Rogue from "Xanathar's Guide to Everything." As many Rogue abilities tend to be abstract and involve things that can really only exist in the tabletop I had to make some adjustments accordingly.

Inquisitive

3rd Level: Ear for Deceit

When you choose this archetype at 3rd level, you develop a talent for picking out lies. Whenever you make a Insight check to determine whether a creature is lying, treat a roll of 7 or lower on the d20 as an 8.

3rd Level: Eye for Detail

You can use a bonus action you can focus your senses and detect invisible creatures. (See Invisibility)

You can do this once per short rest.

3rd Level: Insightful Fighting

You gain the ability to decipher an opponent's tactics and develop a counter to them. As a bonus action, you can make a Insight check against a creature you can see that isn't incapacitated, contested by the target's Deception check. If you succeed, you can use your Sneak Attack against that target even if you don't have advantage on the attack roll, but not if you have disadvantage on it.

This benefit lasts for 10 turns.

9th Level:  Steady Eye

Your gain Advantage on all Perception and Investigation checks.