Bram made one of these for the 24 hour puzzle marathon, see his set. This puzzle probably explains why the marathon one was only solved by Germans…

Rules Shade some cells to form an orthogonally connected wall that contains no 2×2 square. The white cells within an area must form a tetromino, and two tetrominos that share an edge must not be of the same type. (The O-tetromino is possible.)