Hi i am having trouble with missing games in my library in GOG , I barely open GOG in my pc but recently i buyed The Witcher 2 and then i notice some games that have disappeared like Star Wars The force unleashed 1 and 2(i just know these two) .
Is someone having the same trouble or is just me ?

Have you bought these games from a key reseller? There were several other users before where games from key resellers got removed. Those keys aren't legit.

Have you bought these games with a different account and you forget that you actually did?

You can try to do an account refresh by clicking these links and see whether the games are in your account:

https://www.gog.com/account/refresh
https://www.gog.com/user/refresh

If that doesn't work you have to contact the GOG support. Do you still have the emails which GOG send you when you bought these games? You need these emails for the GOG support.

I have SW The Force Unleashed 1-2 in my account, so at least they haven't disappeared from everyone.

Do you see the games under "Your name" ===> "Orders and Settings", ie. that GOG thinks you have purchased them?

Do you have the email receipts from GOG when you bought or redeemed those games? They are your proof of purchase, never delete those emails.

By the way you're talking about it, it seems you're checking your library from Galaxy.

I don't use Galaxy, but, if Im not mistaken, you can add various libraries into its single launcher, like Lutris and Heroic do.

Here's a tip that may also help:
Check if you have not removed library sync with Epic and/or Amazon Games because, if I remember correctly, both games were given away a long time ago and maybe you tought that you had them here on GOG, but they were actually from another synced store.

Just my random cent to the problem. Good luck!