BLACKOUT PROTOCOL. The outer grid is dark. Route the last reactor through three towers and hold the Core for fifteen seeded waves. Path, Maze and Endless remain available.
First three combat towers link automatically. Each link drains 1.5 power per second from 100 power per wave. Select a tower and use E to reassign three sockets. R chooses +25% damage or range. O spends 20 power for up to 6s of +60% damage and +25% range, draining 3 power per link per second. Heat trips at 85 and reconnects at 35; towers always retain standard fire. Cyan conduits show your links. Keyboard: 1–6 pick towers, arrows move a tile cursor, Enter builds/selects, U upgrades, X sells, P/Escape pauses.