Note: A tank equipped with two SP-Stabbers is required for this trick. First, use the hills for cover and wait for the Walker. Then, when it is close, run and jump and hit it while firing. With some luck, the Walker will fall. Once on the ground, the Walker will immediately try to get up again -- waste no time in killing it. When the Walker is on the ground, it cannot shoot you. Another technique is to use the thumper device on Walkers. They will be spinning around so fast that they become easy tank fodder.