I'd say L4D2 is work $7 if you like the game type.
I bought it. I was pretty much waiting for it to go below ten bucks. Left 4 dead one was really short on content so I didn't have much interest in 2. I'll play it a little when I'm done with Clear Sky.
Also. I really like MW2 multiplayer (despite it having fucking matchmaking) however, even when 50% off the map packs (combined they have 6 new maps and 4 remakes) are 15$ total it only just BARELY seems worth it. Should I buy it and forsake whatever the next sale steam has? This could reignite my interest in the game pretty quickly...
Of course if I don't buy them, who knows when they will become cheaper again... and $30 for the packs is totally out of the question.
I hated Bad Company 2's campaign. it was pretty awful
Yeah it wasn't nearly as good as the first one's campaign. Pretty dull.
Also I made this with google's new chart app:
