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Duke Nukem 3D Hints
Where is the blue key card?
1 of 3: The blue card will open the locked door in the room with the orange water tunnel.
2 of 3: Once you pass through the first force field, and go down the stairs, you'll come across another large room (with the aforementioned water tunnel).
3 of 3: You'll find the card lying on some crates, in an adjacent room that's rather dark.
