First I thought this Colossi was a dog or bull or something like that, but somewhere I read it is a tiger-Colossus.
And the second time I played the game I realized this Colossus walks like a big cat (if you are in the water and the angry Colossus is waiting to catch you if you are coming out of the water).

But I have to admit that this Colossi has barely similarity (Ähnlichkeit ^_^ ... es lebe dicct.cc) with the game-Colossus. But I think the background has ^_^

Without photoshop lens flare.

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Also take a look on my other Colossi-Stained-Glass Pictures

Valus [link]
Quadratus [link]
Gaius [link]
Phaedra [link]
Avion [link]
Barba [link]
Hydrus [link]
Kuromori [link]
Basaran [link]
Dirge [link]
Celosia [link]
Pelagia [link]
Phalanx [link]
Cenobia [link]
Argus [link]
Malus [link]

Title [link]
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Non-Stained-Glass Pictures:
Avion [link]
Malus [link]

I hope these links will work ...