Any Single Player game DoTA-esque?

Steam has sales all around the year, there should be one coming up with christmas.
Everything goes on sale, some games as low as 90% off their original price and most at between 50 to 75% off.
Essentially this: http://gaben.tv/

Not everyone cares to wait, but i usually wait with buying games until they're on sale unless it's something i've waited for.

Wow that's amazing. Pretty cool to drop that low.

Although something came up when I was thinking it over. Since you don't exactly get a disk, does this mean I can only download and play the game on only one PC? Like if I get a new comp do I lose the game since you download it directly from steam?