Mm, yeah, sorry about number 6, BUT THE CHARACTERS ARE REPLACED! I've added a hint for number four, which is one of my favourite multiplayer vs games. Ever made. Number 3-4 are household names, I just chose a bit more difficult screenies than I could've, but someone should get them. I think.

Ahem, you're, eh, very... close... Ragnar. Or not.

1. Contra Hard Corps Uprising - guessed by Flave
2.
3.
4. XBL game
5. Brutal Mario - guessed by Iamerror
6. Tecmo Cup Soccer - guessed by Flave
7. Castlevania: Order of Ecclesia - guessed by Gare
8. Adventures in the magic kingdom - guessed by Zally
9. Joe & Mac - guessed by Gare
10. Grim Fandango - guessed by Gare
11. Battle of Olympus - guessed by Iamerror