Turn base -

Description

Game where player play one after another. Usually time based.

Test case -

Description

Description of a test. A set of action, input and the desired outcome

Use

Testing

Theory of flow -

Description

A theory from psychologist Csíkszentmihályi that views flow as the state of happiness. When in "flow" a person is fully immersed (aka in the zone).

Use

Game Design, Player experience