Navigating the grueling campaign in They Are Billions requires a delicate balance between strategic tech research and efficient base management. Players must rebuild human civilization while holding off relentless swarms of infected across diverse terrain types and mission styles. Mastering the campaign structure ensures your colonies survive even the most overwhelming horde encounters.
Prioritizing Essential Tech Tree Upgrades
Choosing the right technologies early in the campaign tree dictates your overall survival capability across future missions. Investing in fundamental infrastructure like Farms, Logistics, and Cottage upgrades allows your economy to expand rapidly on constrained maps. Unlocking advanced military units like Snipers and Thanatos early on provides the necessary firepower to handle dense infected clusters.
Researching defensive fortifications such as Stone Walls and Ballistas gives your perimeter the durability needed to hold key choke points. Balancing economic upgrades with military enhancements prevents your colony from suffering catastrophic bottlenecks during critical horde waves. Careful research planning ensures you never enter a high-difficulty mission without adequate defensive options.
Mastering Hero Missions and Tactical Exploration
Hero tactical missions offer a distinct change of pace by forcing players to control a single commander through infested ruins. Exploring every corner of these abandoned facilities is essential for gathering valuable Empire Points and Research Points. Taking your time to clear rooms systematically prevents your hero from being overwhelmed by unexpected enemy swarms.
Using environmental hazards like explosive barrels helps clear large groups of infected without risking unnecessary damage. Managing your health packs wisely guarantees your commander survives tough encounters with special infected like Chubby or Executive zombies. Collecting all hidden research items ensures your global tech tree continues to progress smoothly.
Defending Outposts and Managing Swarm Missions
Swarm missions on the campaign map test your tactical unit placement against thousands of oncoming infected without base-building mechanics. Positioning barricades and deploying large cohorts of Soldiers or Snipers in tight formations maximizes your damage output. Utilizing natural bottlenecks on the terrain forces the horde into concentrated kill zones where your troops can clear them efficiently.
Placing Lucifer units at narrow passages provides continuous area-of-effect fire that melts lesser infected ranks before they reach your lines. Proper positioning ensures your forces hold the line without suffering severe casualties during extended waves. Securing victory in these outpost battles unlocks vital pathing options toward primary territory objectives.
Optimizing Colony Economy and Defensive Perimeter Layouts
Building a resilient colony relies heavily on expanding your borders early while maintaining strict noise control near unexplored zones. Pushing rangers outward silently secures rich resource deposits without drawing massive groups of nearby infected into your perimeter. Layering your walls and placing overlapping defensive towers ensures that a single wall breach does not lead to total colony destruction.
Distributing energy grids strategically keeps essential structures powered while minimizing vulnerability to cascade power failures. Maintaining a steady flow of gold income through market trading and housing upgrades allows for quick military reinforcement when emergencies arise. A well-organized layout guarantees your settlement can withstand the final massive horde attack.
