Just in the case you're stuck in the game, here is a short walkthrough. The first spoiler only indicates the method to search for the solution, the second one the solution itself:
1. Puzzle:
Solution:
2. Puzzle:
Solution:
3. Puzzle:
Solution:
4. Puzzle:
Soulution:
5. Puzzle:
Solution:
6. Puzzle:
Solution:
7. Puzzle:
Solution:
Hope the walkthrough could help!
Have fun with the game!
David
1. Puzzle:
Spoiler
find number of Perelman in the archive
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Spoiler
875613
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2. Puzzle:
Spoiler
look at the year dates and try to form them out of the digital numerals
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Spoiler
2010
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3. Puzzle:
Spoiler
lead Perelman to the IT-Room
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Spoiler
top left
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4. Puzzle:
Spoiler
try to figure out the numbers ONE BY ONE (the red light will turn green if you're right)
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Spoiler
1573
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5. Puzzle:
Spoiler
just by asking about the password and George's family you can find the entrance
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Spoiler
first type "GEORGE", then "KAROLINSKA"
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6. Puzzle:
Spoiler
first seach the exit door and have a look at its colours
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Spoiler
all screens have to be yellow like the door frame to leave the exit door
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7. Puzzle:
Spoiler
try to obtain the arrow symbol
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Spoiler
white, blue, red
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Hope the walkthrough could help!
Have fun with the game!
David