Tic Tac Toe

Trickster vulnerable to their own name backwards

A fear of aliens

Killing trees to clear land

Epic Greek king

Levelheaded state

Expertise at assessing people or situations

Term used to describe the original source's account

The MIT court commonly known as "The Dot"

Explorer of hell in arguably the most famous self-insert fanfiction

Rowboats, or other similarly sized vessels

A condition of reduced sensibility or thinking

Former name of a populous Eurasian city

Test given without warning

Edsger of an eponymous algorithm

Rattail or pixie, e.g.