A round disk used in certain board games?

You're probably thinking of a counter.

Counters are small, flat, round disks used in many board games to represent things like:

* Players: Each player has their own color of counter to track their pieces or progress.

* Units: In strategy games, counters can represent soldiers, armies, or other units.

* Resources: Some games use counters to track resources like money, points, or special abilities.

Let me know if you have other clues about the game or the specific counters!