Second Sight Cheats
X-Space '92 mini game
On level 6, Madness, use a computer disk found in the level on a PC to play the X-Space '92 mini game. Once this has been done, the game will be able to be accessed on the "Applications" sub-menu when you pause your game.
On level 3, Experimentation, on the PC where you killed the security guard outside the elevator, open the "Front Desk" applications folder on the desktop. Then, select HyperChat. You will then be able to see what the Guard has been up to, as well as that the person who the guard was talking to continues talking and gets more worried as he does...
Earth Impact mini game
On level 8, Reliance, go into the games room to find a fully-operational Earth Impact mini game. Once this has been done, the game will be able to be accessed on the Applications sub-menu when you pause the game.