One other consideration is how challenging a game do you want. I have a 4 Square and a Drop a Card almost side by side. 4 Square is relatively easy and once all the special lights lit, lots of fun to try getting that free game pop pop pop if you can hit 2 or 3 in quick succession. Drop a Card on the other hand has the drop targets but is a really challenging game (for me at least) so kind of like scoring a goal in soccer, when you do win a game it is a big deal. Both have their advantages, and appeal to me differently depending on my mood. One of the reasons its better to have more than just one em.