About

Tower Defense JS is a classic browser tower defense game: waves of enemies walk a fixed path toward your base, and you place towers along the route to destroy them before they arrive. Each tower has a cost, a range, and a damage type. Managing resources across waves — saving up for powerful towers vs. buying cheap ones immediately — is the central strategic challenge.

The game rewards knowledge of enemy types and tower synergies. Some enemies are fast but weak; others are slow but absorb enormous damage. The right tower in the right position can handle ten waves; a misplaced one wastes gold you needed elsewhere.

Tower Defense JS runs in the browser without installation and a typical run lasts 20–30 minutes — manageable over a longer break or split across two sessions.

How to Play

• Click a tower type from the panel, then click an open tile to place it.
• Towers attack enemies automatically when they enter range.
• Earn gold by killing enemies; spend it on new towers or upgrades.
• Prevent enemies from reaching the end of the path — each that escapes reduces your lives.
• Survive all waves to win.

Tips

• Place slowing towers first — they multiply the damage output of all other towers.
• Corners and choke points are the most valuable positions; one tower covers more path there.
• Save gold between early waves for powerful mid-game towers rather than spam-placing cheap ones.

History

Tower defense emerged as a Warcraft III custom map genre in the early 2000s before becoming a standalone genre. Desktop Tower Defense (2007) was the pivotal browser game that proved the format worked without an RTS engine. Plants vs. Zombies (2009) brought it to mainstream audiences. Tower Defense JS is part of the open-source browser tradition that kept the genre accessible without app stores or downloads.