At Pier21 I saw an interesing Tetris variant. It had minos made out of hex pieces and the well was slanted. You could place pieces not only on the bottom of the well, but also on the left side because of this. However I do not know the name and have no idea how to find it.
Definitely hexion by konami, it has a few modes, one with a regular rectangle well, the slanted well, and a super wide well. It's actually a very fun game, highly recommended.
