@kindKnight Just got this, found out the collision in the "Lumos Lesson" area is bugged;
Jumped on the wood bench near the build blocks, fell through, swapped characters and one fell through the door the Goblin should open.
Swapped to them and went to the locked area before Mission 2.

This game is interestingly buggy compared to the original.

rip i thought this was gonna be a infinite studs guide -w-

would've been better if they'd launch an update for all the old lego steam games that include achiements from the 360/ps3.

They could have added achievements via an update.

You forgot "add achievements" to step 3.

I will use this guide.