There's also a multi-player mode if things get a bit to easy or dull.Ĭall of Duty 4 is built on a new proprietary engine which offers much better support for up-to-the-minute lighting effects, clearly visible in this test mission. The graphics in Call of Duty 4 are top notch, and we didn't notice any lag even at higher-end settings, although older Macs may struggle. Call of Duty 4 features a range of combat situations, including the use of anti-tank weapons, the destruction of an anti-aircraft battery and at least one seriously fast-paced, confusing fire fight.