Trying to find old games. please help?

Okay, so i am in the process of looking for two games, one of them was like a zombie game in which you enter a mansion and battle zombies, and go outside into a lair, and all. it's not Horror Zombie of the Crypt. The other is like a space kind of game, in which there are lazers you shoot out of and i think you;'re a probe. i don't quite remember. the game i remember i used to play on the computer was Chip. I believe, i played those games during 1999 - 2002. i don't remember with what computer i played it with, but im trying to find them, I really want to play them again. please help me.