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Huge Crisis Zone is a level in the Nintendo DS game Sonic Rush. It is the fifth level for Sonic and sixth level for Blaze. The Zone takes place on an aircraft carrier seemingly belonging to the G.U.N. organisation, as evidenced by the abundance of G.U.N. robots patrolling the Zone. This marks the only appearence of G.U.N. in the 2D Sonic games to date.
The level shares some similarities with Sonic 2's Metropolis Zone, including hazards such as crushing pistons and jets of steam, as well as the use of spin tubes to ferry Sonic to new areas of the level. Aside from these, the level also includes jet-powered sleds and mechanical cranes to help Sonic along to his next destination.
Similar to Mirage Road Zone, as well as the usual fast-paced sections there are also sealed rooms, in which the player must defeat the G.U.N. robots that appear to proceed.