This weekend, you can play Dishonored for free until Sunday at 1PM. If you decide that you like the game and want to buy it, you can get the base game for 75% off or $4.99 (USD). You can then save 50% off of the DLC for a total of $14.46 plus the price of the game.

Or, you can get the GOTY edition of the game which includes the game and all DLC for just $10.19.

Frankly, you should probably just get the GOTY edition unless you like paying more or you already own a few of the DLC packs already.

Again, that's assuming you want to buy the game after this free trial. You can download it for yourself and begin playing right this second simply by clicking here (will open Steam).