Written by the people who make the games, from the way the games really work: the actual scoring, costs and rules. Use them to get past a tough level, work out why a run went wrong, or just see how a game is put together.
Tower defence with logic locks, relics and a daily Gauntlet.
Lane defence: stop the bugs before they reach your core.
One bug in every colour zone, found with logic alone.
Dots and boxes on squares, triangles and octagons.
Pour, drive and slide: three sorting puzzles in one place.
A minesweeper-style delve through the fog.
Drag your turret, shoot the bugs and pick an upgrade after every wave.
New to the site? Start with How to play, or read about Lock & Spark.