You need to finish the whole game in under 50 minutes. The timer begins as soon as you hit the start button and doesn't stop until one of the two final choices at the end of the game. You should finish all the single level speedruns and shard collection before you even try to attempt this one. It's all about strategic level picking.

Here are the recommended levels and reasons:

• 0) Chess - Yes, you have to do it the crazy way - if you fail the balcony jump over 2:20 minutes, start over!
• 1) Steam - Just run it the usual way because all fears are automatically on.
• 2) Shout - You still have to run through the whole level but there will be at least one fear off.
• 3) Pearls - Having Shout OFF, use the first biggest shortcut in the level and then do the rest of the level the usual way.
• 4) Planes - Now you have every essential fear OFF to make it through using the speedrun method.
• 5) Trees - This is the same, use the speedrun method and finish it quickly.
• 6) Finale - Make sure you do not fall over.

It is important to note this has to be done in one sitting. The game will not record your total overall time unless you finish it in one sitting.
 

Speedrunner - Last 15 Minutes