This mech paper model is Nova Cat, an OmniMech from the video game MechWarrior 4, the papercraft is created by Shiftdel, skins by Sturm, and the scale is in 1:40. The size of finished model is about 248 (H) x 198 (W) x 142 (D) mm.
After its defeat on Tukayyid, Khan Severen Leroux of Clan Nova Catbegan talks with the Draconis Combine, and, to preserve the Clan both militarily and spiritually, ordered the design and production of the Nova Cat OmniMech. The twelve meter tall totem 'Mech of Clan Nova Cat is based on the Night Gyr created by Clan Jade Falcon. The basic components of this design, combined with its characteristics as an OmniMech, make it very simple to repair and leave room for the large amount of double heat sinks most variants carry. Thirteen and a half tons of standard armor make this 'Mech very difficult to kill. [Source: sarna]
You can download the papercraft model here: MechWarrior 4 - Nova Cat Free OmniMech Paper Model Download [Skins]