廃墟の都市で人類兵士がエイリアンウォーカーと激突

A futuristic tough and gritty image of alien invasion combat. Humans are hanging on by a thread and are hiding behind cover and concealment with their photon weapons as giant alien walker type vehicles that look like dangerous insect like creatures, roll through the ruined city. The alien invasion has almost triumphed but the tough humans are showing thier tenacity when fighting for their planet