I am looking for mathematical games for an undergraduate `maths club' for interested students. I am thinking of things like topological tic-tac-toe and singularity chess. I have some funding for this so it would be nice if some of these games were available to purchase, although I am open to making the equipment myself if necessary.
So the question is: what are some more examples of games that should be of interest to undergraduates in maths?
Perhaps Hex/Nash? I've seen some quite elaborate boards, although they are often (always?) hand-crafted. The link to math would be Nash's non-constructive proof, Nash's life and work, and maybe analysis of connection games in general.