Tile-centered, grid-aligned landmines with up to 6 spacing variants in 3 patterns: Cardinal, Diagonal, and Hexagonal. Includes upgrade and deconstruction planners.
BPs are the minimum size needed for tiling, so just 1 or 2 mines. "Zero Spacing" is just a single mine, for example. (Somehow nobody has uploaded this yet - all of the landmine BPs I could find were ancient and use a wood chest to create grid alignment.)
Landmines have a 2.5 tile trigger radius and 3 tile damage+stun radius. This is measured from the center of the entity, not from the edge of the sprite. The stun lasts 3 seconds.