Inbound UFO

Inbound UFO is a tower defense game set during a full-scale alien invasion. You lead a brigade in a classified army division trained and equipped to handle these encounters, placing and commanding towers to defend against alien forces attacking apparently random locations. The invaders have disabled some of Earth’s most powerful strategic weapons and destroyed its most advanced satellites in orbit.

The invasion

Even the smallest alien can be difficult to stop. The army is short on money and communication is troubled, so calls for Army Support may be delayed. Headquarters supplies several towers from the strategic army stock for free; you must earn cash and research funds by proving your skills.

Plan your defenses

You plan each map for the worst case, manage the military budget and choose where to deploy your towers. You can sell towers already in use to reposition your defenses. Towers can be upgraded and equipped with secondary weapons, balancing improved capabilities against the costs of deployment. Controllable towers accept orders, letting you target an enemy, arrange an ambush or hold fire for a shot from behind. A Time Slowdown ability gives you more time to make tactical decisions.

Campaign and forces

The campaign has 20 missions and an automatic wave generator that unlocks as you advance through it. You can deploy 16 towers across four categories, with four tiers in each category, against 20 enemy types. Each enemy has its own AI, skills, strengths and weaknesses. The game also features realistic projectile physics and AI reactions.