American McGee's Alice - The Mad Hatter's workshop

This video features the final level of the Looking-Glass Land from American McGee's Alice, the Mad Hatter's Workshop, as the well as the boss fight against the titular character himself. To be more precise, the video starts around the ending of the Dee twins boss fight and ends when Alice and the Griffin make their escape from the workshop. Note that this footage was taken on the PC version of the game with the Alice Madly Enhanced mod (which basically provides the game with several HD textures and tweaked graphical effects) installed.

As the final boss of the area, the Mad Hatter will come into the arena himself and try to hit Alice with either his cane whenever he'll be close enough, a salvo of missiles from one of his fingertips or three tea pots/granades from his hat. After reciving enough damage, the Hatter will retreat and send in two Automata: you'll have to defeat both of them before the boss will decide to return to the fray (they are also useful to recover both health and mana, since they spawn a whole heart each upon being killed). This will go on till the Mad Hatter will be defeated, his death animation will play and you'll be allowed to proceed.

It's worth mentioning that if you managed to get the Jacks from the previous levels they are, for reasons not better stated, exceptionally effective against the Mad Hatter and using just them for the whole fight will defeat the boss much, much faster. This is to be expected, as the Jacks are arguably the best weapon in the entire game save for the Jabberwock's Eye Staff and the Blunderbuss (which are acquired much later)