Rock Creek Bridge

Rock Creek Bridge is a unique Grade 3 mission assigned by GeoCorp. This mission is added in version 1.3.3.

Synopsis
GeoCorp finds out that the access to Rock Creek Bridge has been blocked and wants the player to find out what was happening. They also demand the bridge to be cleared so everyone else can use it again. The culprit, Wing-Nut, refuses to bulge and gives the player one choice - A payment of 100,000 BB for various fees that he claims to have been covering the whole time. The player either chooses to submit, or defeats him and the bridge is cleared.

Strategies
Wing-Nut is a powerful opponent. He is equipped with several Hawkeye HG1 Cannon Turrets and Mk3 Battleship cannons. He does not have any active power blocks nor any homing weapons except for those DFA mortars, which has little firepower due to the small quantity. However, this also makes a direct assault difficult. If not wanting to engage him, the best choice is to bribe him. Fortunately, Wing-Nut remains neutral before the player goes across the line on the bridge, leaving them with as much preparation time as possible.

To fight him, there can be some strategies. Since his firepower is enormous, one can theoretically build a tech that is light enough to get to the sides or behind him (small 2-block high tech would be able to avoid the cannons), then add some other weapon blocks and chip him down from there, as these are his blind spots, making him unable to retaliate. From there, the fight should be easy, since Wing-Nut has an explosive core inside. With cautious dismantling it is possible to retrieve a nice chunk of the blocks Wing-Nut made of.

Another somewhat hidden strategy can be executed by a simple, fast-moving tech. As soon as one goes beyond the line, quickly drive off the bridge and into the canyon below. Wing-Nut will likely follow and his control block will self-destruct once it goes any lower than the bridge's surface, defeating him instantly. This method, however, destroys a significant share of valuable Wing-Nut's parts.

Trivia

 * This mission cannot be cancelled due to it spawning specific, permanent terrain structures.
 * The bridge itself has GSO's emblem and color scheme, implying that it was formerly maintained by GSO until GeoCorp took over. In the process, the bridge presumably went under their surveillance. But from how Wing-Nut gained control of it, it seems that they were either not in firm hold of the bridge either or Wing-Nut used brute force.
 * Considering that Wing-Nut is made of mostly GeoCorp blocks and also gives GeoCorp XP when destroyed, it is safe to assume that he could have also used his internal advantages to gain control of the bridge.
 * GeoCorp appears to be monitoring the situation, as they respond as soon as Wing-Nut is bribed/destroyed, contrary to how they do not know the situation in the mission briefing (They stated that they only know someone was blocking off the bridge's access and did not appear to tell how or why it was blocked), and are apparently unable to deal with Wing-Nut on their own. This suggests even more than Wing-Nut apparently is vital to GeoCorp at one point, or at least, is able to effectively resist their orders, to the extent the Corporation itself has to hire someone else to deal with him at their own expense just to get the bridge clear.
 * It could also be possible that Wing-Nut simply left GeoCorp (Like how Spider King left Hawkeye) and is thus no longer under their influence, however,
 * It is the earliest opportunity to gain access to the Hawkeye Mk3 Battleship Cannon and the HG 1 Cannon turret even before the player can have their Hawkeye license.
 * GeoCorp's post-mission quote will change depending on if Wing-Nut falls off the bridge or not. If he does, they will say "He fell off the bridge". Otherwise, they will say "The Bridge is Clear!"
 * It is the first case where a tech's control blocks can self-destruct. The second is the Bomber Command mission.
 * Once the fee is paid, Wing-Nut says that he'll have to tell Mike. It is unknown who this "Mike" is, though he may be referring to Crafty Mike, who is a known con artist.
 * This piece of dialogue wasn't added until some time after the mission's release, however.