I've had this 2 games in my mind for a while now with no luck finding them... maybe i would be able to find them here
Both are from pc, and are, at least 10 years old. I remember playing one of them 13-15 years ago, the other might be a little "new".
The first was a car game... but not just a car game. I remember that in order to ENTER the game, a jukebox appeared with a question, and you had to answer it correctly to be able to start the game (otherwise it would close). At that time i didnt know english so it was more like a roullette rather than answering the question. When you were able to enter the game, you started with money and no car in your garage. You could use a newspaper to buy a new or used car. Then you could buy different parts and exchange them in the garage (i remember changing the motor, removing the screws and putting a new one). And then you could go to the street to run vs ppl. You could bet money or the car. If you won the car, you could then choose which car you would use and that car would enter the garage. You could paint it, put stickers, change tires, motor and other parts. It had nice graphics considering what i can remember and the time it was made.
The other, although "newer", it had less graphics. It was kinda like lemmings, but at the same time, it wasnt. The only thing i can remember is that you could use like a laser to make a hole in the ground where you could "trap" the enemy. After some time, the hole closed. I think you could "construct" like walls/"metal things" that could block the path. The view i think it was like the lemmings or like worms. Also you had a "customize level" thing in which you could "modify" the ground, add enemies and things.