These codes do not block achievements as with every LEGO game. Remember that entering the codes will give you the item but you still have to unlock and collect it in the hub to get 100% completion.

Here is the full list of all 50 LEGO Indiana Jones: Original Adventures achievements worth 1,000 gamerscore. Unlock secret area in the museum. 2 guides. Hey! You call him Dr. Jones!
Decipher the panel and a secret passage to another bedroom will open up. Once you enter the bedroom, the secret passage will close and the previously-closed door back in the hallway will open up, letting assassins in. Quickly defeat them, then start investigating the room. There is a weird statue here, but you can't do anything about it yet.
Use the pile of bits to build a raft. Hop on and paddle down the river to the left. (Or, just swim downstream.) Hop onto the bank and dig up the sparkling area to unearth artifact piece #2. Build a raft and paddle downstream. Dig up the sparkly patch of earth. Artifact piece (2/10).
Lego Indiana Jones: The Original Adventures is an video game developed by Traveller's Tales and published by LucasArts. The game will allow players to recreate moments (albeit much more humorously) from the first three Indiana Jones films. It will feature the same drop in/out co-operative play mode as seen in the Lego Star Wars video games.
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lego indiana jones secret codes