Lara Croft returns in Temple of Osiris, ready to use her brains and brawn to best a gauntlet of new puzzles. In our second Developer Diary, Executive Producer Scot Amos is joined by Lead Level Designer Jeff Wajcs, who discuss the difficult task of perfectly challenging a player.

Take a peek at the mirrors, time bombs, twisting gears, and falling platforms you’ll need to manipulate to solve your way out of trouble, alone or with friends.

And the first developer video displaying four player co-op:

Lara Croft and the Temple of Osiris launches on December 9 for Xbox One, PlayStation 4, and PC.