We report on the synthesis and characterization of Mn3Ga thin films with controlled phase and orientation using DC magnetron sputtering. High-quality Mn-deficient hexagonal Mn3Ga films with C-plane and M-plane orientations were achieved on various single-crystal substrates, and their structural properties were systematically investigated by x-ray diffraction. Magnetization, Hall effect, and neutron diffraction measurements confirm the formation of antiferromagnetic order below TN = 460-470 K and reveal its characteristic magnetic behavior. A sizable anomalous Hall effect is observed coexistent with weak net magnetization, consistent with the 120 degrees noncollinear spin structure. The ability to tune both the crystal phase (hexagonal vs tetragonal) and orientation through composition and thermal treatment provides a platform for exploring the intrinsic magnetic and topological properties of Mn3Ga, with promising implications for antiferromagnetic spintronic applications.