If you have been itching to fortify your perimeter without breaking the bank, Steam has just kicked off a sale dedicated entirely to the tower defense genre.

Valve is running the Steam Tower Defense Fest until 10:00 AM on the 16th (local time). There are 183 titles currently marked down, ranging from this year's fresh releases to several heavy hitters that have managed to hold onto a 'Very Positive' rating from the community.

The lineup is quite substantial. Notable mentions include 'Bloons TD 6' (60% off), 'Gnomes' (50% off), 'Defender's Quest: Valley of the Forgotten' (80% off), 'Dungeon Warfare' (75% off), 'Dome Keeper' (60% off), 'Diplomacy is Not an Option' (55% off), and 'Orcs Must Die! 3' (80% off).

If you are chasing something newer, the sale also covers recent arrivals and titles that have finally graduated from early access. Check out 'The King is Watching' (35% off), 'Machine Mind' (10% off), 'Node Hold' (40% off), 'Lift Reef' (35% off), 'Mech Fortress' (10% off), 'Desktop Defender' (30% off), and 'Relic Guardian-Tower Defense' (25% off).

Once the tower defense festivities wrap up, don't put your wallet away just yet—the Steam 'Spring Sale' is slated to begin on the 19th (local time). Following that, Valve has already teased a roadmap including fests dedicated to home and house games, hidden object games, and medieval titles.