They're coming for your loot. Hold the Tool Cupboard.
Expand your base and upgrade its tier at the workbench (up to 25 mounts) - wood → stone → metal → HQM
Unlock weapons and upgrades at the workbench - one unlock arms the whole base; click a turret for the weapon wheel to equip it free
Hire defenders - they patrol the ground, block raiders, and self-heal out of fire
Outer walls (wood → stone) buy your defenses time · mine the approaches
From wave 8 the air raids start - SAM sites down helis and intercept MLRS
WORKBENCH
// between-round upgrades - everything resets on death
LEADERBOARD
// top survivors - global
Rotate your device
Raid Defense is best played in landscape - turn your phone sideways to defend the base.