Amnesia

[MsInterpret]

"Amnesia is a very nice looking Dutch point'n'click game. As far as I can work out the idea of the game is that you were going to see a professor in a laboratory, but you were knocked out, abducted, and then locked in the lab. Your task, I assume, is to escape. I've currently found what I think might be the exit, but the door has a keypad and I'm not sure what the code is, despite the number-letter clues which I have found which I believe must contain the answer" - Lazylaces.com
Language: Dutch

http://www.mjuks.nl/amnesia/game.html

[akanti]

Nice game, but short and pretty easy.
The end is rather dissapointing

[Mxyzptlk]

I don't know where to find the numeric code for the door?

[Ray]

The first enveloppe gives you a great clue

[Ray]

... and the second and third too... if you look down right

[sabiha]

I Found First And Third Envelope. Can You Give Me A Hint About Where To Find The Second One Please

OK FOUND IT

I OPENED DOOR WITH CODE BUT GOT KILLED

[Pouf!!!]

HEEEEEEEEELP, what is the message on the letter?????????

[Mxyzptlk]

Ok I got out, thanks... other messages helped me more than the envelopes.

Anyway here are English translations from Babel Fish...
First envelope message:

"the sum gives entrance you"

Second envelope message:

"five different characters form two an answer"

Third envelope message:

"the key to inaccessible a=1 b=2 c=3 etc"

[Ray]

In the same room as the keypad where you enter the code.

[Pouf!!!]

tHANK YOU MXYZPTLK!!!!!! IT'S HELP ME A LOT!!!

[Old Cuss]

Thanks for the translation, but since I can't read any of the other notes around I can't figure out what word(s) to be using to get the code. Any help?

[Ladybug]

i'm dutch so if u give me the words i'll translate them for you. but can u help me by telling me where i can find more envelopes?

[Ladybug]

found the first an the third but where's the second one?

EDIT: found it now the words

[keeper0430]

Thanks for the translation, but since I can't read any of the other notes around I can't figure out what word(s) to be using to get the code. Any help?

me neither!!

[Old Cuss]

Sorry I couldn't help with the envelopes, I just got back to my computer. As for the words, I don't need specific words to be translated, I just need someone to call my attention to which words to be using with the alphabet code thing so that I can figure out the numbers for the door panel. Since I can't read the other mesages I have no idea which words are important.