The view matrix could, i think, be a shear in x, followed by a shear in y followed. i.e.

Sx =
[ 1 sx 0 0 ]
[ 0 1 0 0 ]
[ 0 0 1 0 ]
[ 0 0 0 1 ]

Sy =
[ 1 0 0 0 ]
[ sy 1 0 0 ]
[ 0 0 1 0 ]
[ 0 0 0 1 ]

experiment with sx and sy each between 0 and 1 to get the particular tile shape you want.

The projection matrix is just whatever parallel projection is appropriate for your application.