Name the Last Original Game You Played

[raptor2022]

...which leads to the logical conclusion.

IT WAS ALIENS!!!

[Lupus]

That statement implies original thought does not exist and that everything that exists today has existed before and we have merely reproduced these thoughts. Thoughts which themselves couldn't have been original and thus must have been gained from an external stimulus, which leads to the logical conclusion.

IT WAS ALIENS!!!

I knew it, I suppose there was once, but it's very difficult to find in todays world as originality is generally shot down. We all must conform we are the borg is what happens, it's why there are some many shows about Vampires, why similar movies get released at almost the same time etc...
Especially when you consider the OP's original statement a game pulling nothing from anything else that has ever existed type statement, there is therefore no original games as they all pull from something ;-)

[OmegaFenix]

Nope Pong wasn't original either, it was based off of Tennis that was made originally with an oscilloscope screen. There aren't any original games really. It's like asking name an original song, video, book etc.

There are not more than five primary colours, yet in combination they produce more hues than can ever been seen. - Sun Tzu in The Art of War

While the core ideas may no long be original the assembly of these ideas keep giving us unique games.

[Lupus]

Ah then Ico was pretty original

[Tank]

Metal gear

The orginal one from 1987
http://en.m.wikipedia.org/wiki/Metal_Gear_(video_game)

[Ze Snake]

Day of the Tentacle

Find a game as awesome an original as this >.<