T-Chip
T-Chip, which is short for TimeChip, is a program written by Ruben Spaans. It modifies the original level set to change untimed levels to a 999 time limit and creates a new executable called TCHIP.exe; it has no impact on other levelsets.
Scores achieved with this are not legal for official scorekeeping purposes, but they are counted as a separate competition alongside, with the theoretical bold score if there was a 999 time limit being the goal. Such scores are generally written inside [brackets].
Nowadays, level editors can do the job of T-Chip manually, and Tile World keeps track of T-Chip times on untimed levels just as it would a time on a regular level, so T-Chip is rarely used today.