I found a website with all the dosgames on it, it is very fun because you can download it and the play it all though some games are demo or they are not free to get the other levels.
The good thing is you can see screenshots and if you like it you can download it.
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Flashgames
This is a French and English website based on Flash games you can play all the flash games you want on the web.
Here is one of the games as an example of how good their games that they provide are.
This game is called ZED
More game websites
