BLOCK_LINES

Usage:
BLOCK_LINES <line tag>

Description:
Almost the same as UNBLOCK_LINES except that all lines on the map with the same tag will be blocked, and will NOT allow players and monsters to pass. Only affects two-sided lines.

NOTE: Any things (including the player) touching the line will get permanently stuck. Use with care!

Details:
<line tag> is the line tag in your map editor.