If you're into Assassin's Creed, you probably recognize this Corky. It's Ezio Auditore, from Assassin's Creed 2.
I put crammed as many details as I could into this Corky, trying to resemble Ezio as well as possible.
Here's how to make your 5cm assassin...

Step 1: Supplies

Supplies and tools used:

Champagne cork
UHU All Purpose
Scissors
Small, sharp scissors
Metal cutting scissors
Brown thread
Small pins (without heads)
Permanent markers (black, gold, silver, and brown)
Felt tip pens (black and brown)
Pieces of Red and white fabric
Piece of brown leather
Thick aluminium foil (I got it from a metal food tray)
Cotton wool/ stuffing material

Step 2: Face

As with all Corkies, do the face first. I tried to create a serious, Ezio style face. I left out the beard, afraid that it would turn out too dark.

Step 3: Hood

This was the first time I've created a hood for a Corky, but it turned out fairly well. You'll need some sort of pocket or corner of a sack to make it. I got my pocket from an old pair of shorts, and the color, shape, and texture was perfect. You could, of course, sow it, but I don't have very much experience with that.
To make the hood more puffy, glue some cotton wool or other stuffing material onto the head. Then glue on the hood, as shown in the pictures above (sorry, it's difficult to explain with words).

Step 4: Rest of the Clothes

Now for the collars. To get the red fabric to look like it has a gold pattern on it, I used a dry gold permanent marker.
Then, as you can see above, I glued all the parts for the collar on, but only applied glue to the bottom, so they can still be folded outwards.
Again, it's much easier to explain visually with the descriptions on the photos than by writing everything down. Makes more sense.
Once you finish all the various parts of clothing, fold and glue down the collars.

Step 5: Cape

Glue some red fabric to some brown fabric to make a cape with a red side and a brown side. Glue it to half of the back of the cork, and trim it to the right size. Then, cut out a piece of leather as shown above, and glue it over the shoulder (or where the shoulder should be).

Step 6: Weapons

Even though you rarely see Ezio Auditore with weapons besides his hidden blades, I felt I had to give him some sort of weapon (he is an assassin, after all). So I made a sword and a dagger. I used the blades of cocktail swords for the blades, painting them silver with a silver paint marker. To make the hilts I used black and brown foam rubber.
To attach the sword and dagger to his body, I made a loop with some thread, attaching it with pins.

Step 7: Final Detail

To add to the detail, cut two narrow strips of red fabric (2-3mm), and glue them to the side of the fancy red belt.

Step 8: Done

That's all there is!
Don't hesitate to leave a comment, suggestion, improvement, or question below, and make sure to post a picture of your own Assassin Corky below!