Free single player PC games?

Is there a way to play single player PC games online?

• ...by that I mean, is there some program that allows other users to connect and have their keystrokes register on my system? For example, if I have a game where player one uses WASD to move and space to fire and player two (on the same keyboard) uses the arrow keys and enter, is there a program that would allow a user at a different computer to control the arrow keys and enter remotely AND see my screen?

• Answer:

  theres no way to play single player pc games online cos there <Single player> but i think wt u mean is there a way to play multiplayer games tht arent played online but on the same comp? emm i wud say so with certain software tht lets u control other computers but tht will most likley be Lan connection n i doubt the game wud be playable cos there wud be to much lag