A new speedrun mode (--gotta-gomez-fast) was the most publicized new feature of the 1.12 patch, but I can't find any details about it online. How does it work?
Fez – What Speedrun Mode Does
fez
Related Solutions
It's in the "modern temple" area (the 16-cube door), behind the large 32-cube door.
It'll show as a large black opening if you've already been inside.
This is what it looks like from behind:
It spells "METATRON" vertically if you tilt your head to the left.
Best Answer
It adds a fourth option to the three save slots (called "Speedrun"). It's a separate mode from the main game that adds a stopwatch timer in the top right corner and adds splits (timestamps) for each cube. There is no "saving" in this mode, but a "Reset run" option is added to the game's menu. Here's a video of the mode in action.
The feature doesn't appear to speed up any of the game's transitions or loading screens, but it was written to not count loading times that differ between systems. (The feature request mentions requiring singlethreading but that doesn't appear to have made it to the final.) PC installations should dump the run's split times into
C:\Users\<USERNAME>\AppData\Roaming\FEZTo enter speedrun mode, use the
--gotta-gomez-fastflag on startup. On Steam, right-click the game's entry and open its properties to "Set launch options":