Throughout the story, your alien isn't static. You use "mutation juice" and various loot to change your form, granting you new abilities and specialized stats to handle the rising "Damage Level" in each city. The Climax
As you push through the city blocks toward the enemy headquarters, you face off against massive bosses that reveal more about the fate of the original alien. The narrative is described as surprisingly , providing a bridge between the 2004 classic and the current invasion. If you're looking for more details, Alien Hominid Invasion Guide - Steam Community Alien Hominid Invasion
By the time the fleet arrives, the world has changed. The "not-so-secret" Agents have bulked up with advanced armor, shadow tech, and robotic drones to prevent another incident. Throughout the story, your alien isn't static