After final credits you get to play Treasure Hunt. Anyone got a walkthrough for it as im stuck in the tunnels?

The walkthrough you were looking at, Tomb Raider Underworld Walkthrough should give the locations of all the treasures and relics in the game. If that doesn't help you, here's another guide I found that lists the locations of all the treasures. tombraiderchronicles.com/underworld/walk....

The way Tomb Raider Underworld Treasure Hunt Mode|Treasure Hunt works is that you can select any level to begin from your PDA. The level will be the same as it was when you last left it; none of the puzzles are reset nor the enemies respawned. The only point to Treasure Hunt is to revisit the levels to get all the treasures/relics you missed while playing them, as well as one bonus costume you can use only in Mediterranean Sea.

The Mahalo walkthrough has every thing you need to find the treasures/relics.

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