Moving a trigger area.These levels become solvable by moving downwards a trigger area.
Exit triggers, trap triggers, steel areas: all these can be moved. Lemmings remembers these triggers on a separate map, one trigger info per chunk of 4x4 terrain pixels.
Method- Place a blocker on the trigger area that you want to move.
- The blocker overwrites the trigger with his two blocker fields that turn other lemmings. The blocker remembers the overwritten trigger, so the blocker can write back this trigger when the blocker is released/exploded.
- Assign an exploder to the blocker.
- During oh-no, remove the earth underneath the blocker.
- The oh-noer will fall.
- The oh-noer will explode, and thereby write back the remembered trigger to his current position.
The glitch exploits that the remembered trigger is written to a different position than where the trigger was remembered.
Result- At the source, The blocker removes exits/traps/steel/... and leaves behind his blocker field even after his death.
- At the destination, the blocker writes the source trigger to his final location while dying.