Chain Keep

Chain Keep is a free tower defense you play in your browser, on PC or phone. Enemies march down the road into your castle. Towers of the same kind placed side by side link and boost each other, and a group of three or more forms a chain with a perk: bouncing bolts, bigger cannon blasts, deeper frost, stronger lances.

Fight through a campaign of 10 levels of 20 waves, each harder than the last, with new enemies and bosses. Every run, won or lost, pays relics for permanent keep upgrades, so a level that beats you today falls tomorrow.

Features

• Four tower types plus the Royal Mint, each with two specialisations
• Link and chain bonuses shown right on the board
• 10 campaign levels, each with its own road, stars per level and an endless mode
• Chargers, phantoms, wardens, fliers, healers and four bosses: Warlord, Colossus, Wyvern and Lich
• Permanent upgrades between runs; guided first-run tutorial
• Keeps running in the background when you switch tabs; pause any time with P

How to play

Pick a tower (1-5) and click a grass tile to build it (on touch screens, tap the tile twice). Place matching towers side by side to link them. Click a tower to upgrade or sell it. Space sends the next wave, F changes speed, P pauses, M sound.

Sound starts muted.