Where's Luigi? Can you find Mario's bro in these 10 screens?

Mean green hiding machine
Nintendo declared 2013 'the year of Luigi'. As we've almost come to the end of that year, I thought now would be an appropriate time to have a little fun with the little green fella. So, I've hidden him inside 10 screenshots from, er, reasonably modern games. Can you find him in each one?
There's a grand prize of 0 for the first person to find every Luigi (if you live in the US or Canada, we'll convert that sum to $s for you). Good luck and... oh wait, Nintendo says the year of Luigi is actually continuing in 2014. What is this? The financial year of Luigi? The academic year of Luigi? Oh, who cares, just have a bit of fun finding him in these screens.
Don't forget to click in the top right of each screen to enlarge it!

Sneakier than an Assassin?
Can you find Luigi mixing it with the 18th century pirates of Assassin's Creed 4: Black Flag?

Making himself at home?
Spot Luigi in Gone Home from the comfort of your own home. Or office. Or maybe even on mobile.

Great balls of Luigi!
Roll up, roll up (seriously, who writes this? Oh, yeah...) and see if you can spot Luigi in Katamari Forever.

Save the last Luigi!
Can't spot Luigi in this Resogun image? Maybe you need to look at this screen in a higher... reso-lution.

Got him in your sights?
Well done--you reached the final slide. As a reward, there's no awful pun in this one. Just Luigi hiding in a Hitman screenshot. There's definitely NOTHING else hidden in this image. NOTHING.

See you next year, Luigi
There you have it--our final Luigi feature in this, the year of Luigi. Did you find him in every screenshot? Please don't post your answers in the comments, because that'll spoil it for everyone else. Please DO have a great new year's eve.
Want more puzzling features? Here's one I made earlier called Where's Tingle? Can You Find Zelda's Buddy In These 10 Screens?. Alternatively, try your hand at our Quiz: Name These 10 Painfully Generic Video Game Characters.
