At most, 3

Anthony noted to me today that he owned no game that supports at most
3 players. Looking at my own games, I could only find one, unless you
count games that really should only be played with three (like San
Marco). A couple games I've played, but don't own, such as Warp 6 and Triangle
Game support at most 3, but
the only one in my collection is
Constellation.