From the Lego Indiana Jones Wiki

In this level you must find the holy grail. Enemies include: Enemy Soldier (Desert) and Grail Knight. You can play as Sallah (Fez), Marcus Brody, Henry Jones, Sr. and Indiana Jones.

Contents 1 Outside the Temple 2 Temple 1 3 Temple 2 4 Temple 3 5 Temple 4 6 Temple 5 7 Grail Chamber

[edit] Outside the Temple

Quickly find the key and put in the slot and turn it, then hop on the horse jump off onto the ladder. Here you have to translate both sets of heilogryphics and pull both switchs and head through the doorway.

[edit] Temple 1

Find the two sets of blocks and head through the doorway.

[edit] Temple 2

No more Brody or Henry, solve the glyph puzzle and pass the blades and spikes,then do it again.

[edit] Temple 3

Quickly look for a flashing letter tile dubbed 'I' then hop on the flashing 'E' then hop on the flashing 'H' then hop on the flashing 'O' then hop on the flashing 'V' then hop on the flashing 'A' then hop on the flashing 'H' all the other tiles collapse leave this room.

[edit] Temple 4

Do all this and contiue.

[edit] Temple 5

Just cross the bridge and stay within the Two Poles of the invisible bridge.

[edit] Grail Chamber

Ignore the handle,the Cup filled alcove and area across from the font, instead solve the glyph puzzle and whip across and grab the Dull-looking cup and whip back across then take it to the front. Story complete!