Arsenal Pyramid

Arsenal Pyramid (アーセナルピラミッド) is the seventh stage in Sonic Forces, and the first Tag Team stage in the game. This stage is a re-imagination of the Green Hill Zone from the original Sonic the Hedgehog for the Sega Mega Drive.

Arsenal Pyramid is set inside a weapon factory in Green Hill made by Dr. Eggman. Despite being set in Green Hill however, the area has become dry and sandy due to the heavy desertification caused by Eggman's industries. During the events of the game, it was attacked by Sonic the Hedgehog and the Avatar on behalf of the Resistance.

Overview
Arsenal Pyramid starts in the dried-out part of Green Hill Zone. Like before, the lake areas and waterfalls in Green Hill have been replaced with streams and deserts of sand. However, the location's signature blocky brown mountains are still presents. Most prominent in this region however, are the large mechanized pyramids that can be seen far and wide.

Many of the remains of Green Hill are still prominent in the beginning of the stage (although the flora and checker-patterned soil are all dried up), but these features steady fade away until they are replaced with over-dimensioned pipes and large metallic scaffolds and roads. As the player gets closer to the main pyramid in this stage, one will discover storage areas for neatly-stacked shipping containers, tube systems and metallic structures in the open desert surrounding the pyramid.

The main pyramid has a bridge on the side, leading to a vent shaft on the top. Inside it is a metallic factory full of Eggman robots and massive spinning gears. Also, in the center of the pyramid are conveyor belts carrying around the large shells that the factory produces.

Story
While Eggman worked in the Arsenal Pyramid, the Phantom Ruby showed up at his doorstep. Finding the Ruby, Eggman proceeded to study this interesting gemstone, only for the Jackal Squad to show up to raid his base. During the following confrontation between Eggman's forces and the invaders, the leader of the Jackal Squad touched the Phantom Ruby and was shown his ideal world: a desolated area. Having seen this as well, Eggman convinced the leader to join his cause, which he happily accepted.

E-123 Omega once infiltrated the base as part of a reconnaissance mission. However, much to Rouge the Bat's chagrin, Omega has an extremely loose definition for "recon" and "infiltration", as he proceeded to conduct wanton slaughter of several of Eggman's robots. This ultimately resulted in Orbot and Eggman noticing the attack, and Eggman deducing that he has an opportunity to test out Infinite's powers due to Omega going in alone. Infinite then proceeded to confront Omega, and, after noting his spiritedness, proceeded to defeat Omega in a flash. Shadow then arrives to investigate Omega's last whereabouts.

Much later, Sonic and the Avatar arrive, running towards the pyramid-shaped factory to attack it and open up a path for the Resistance. Knuckles suggests sending reinforcements, but Sonic replies he and the Avatar can handle it. They pass the storage area and run up the pyramid. Using the hole on the top they fall inside the factory and fight the robots, eventually reaching their goal.

Gameplay
Arsenal Pyramid is an overall rather linear road, but with multiple path options inside the factory to make travel down the path faster, depending on what tools the player at their disposal.

Like other Tag stages, the player controls both Sonic the Hedgehog and the Avatar at the same time in Arsenal Pyramid, with the playing switching to Sonic when Boosting and the Avatar when using the Wispon. As such, the stage has mechanics for both characters. For Sonic, the stage has Wisp Capsules filled with White Wisps along the way so the player can charge their Boost Gauge. For the Avatar on the other hand, the stage has floating targets for the player to swing around on using the Wire Attack, and Wisp Capsules with miscellaneous Wisps for fueling the Avatar's different Wispons. However, any Wisp Capsule containing Wisps that do not match any of the Wispons the player has currently obtained will be rendered intangible and transparent until the player obtains their Wisp's associated Wispon.

Description
The Stage starts out with Sonic and the Avatar leading down a road, across a chasm, and through a section with multiple levels. Near the pyramid, after the first Point Markers, Sonic and the Avatar automatically try using the Double Boost. The road from there will leading into a vent shaft with a Skydiving section where the player has to dodge Laser Field Block-like grids.