This paper model is the Phurba (also referred to as "The Dagger" by many of the main characters), an artifact that Nathan Drake found in Uncharted 2: Among Thieves of the action-adventure third-person shooter platform video game series Uncharted. The papercraft was created by billybob884.
The Phurba is a knife with three blades, referred to as "a golden passport to Shambhala" by Marco Polo in one of his journal entries. It is also the icon seen on the screen during load times.
You can download the papercraft model here: Uncharted - Phurba Dagger Free Paper Model Download