Walker Mounts - I kinda went a bit cheesy and borrowed the same theme as Kingdom Heart's magic Heartless with the naming... Still, general thoughts apply through em all. Earlier mecha would have a limited weapon option, whereas later ones would be duel-wielding mecha weapons that compliment each other.
Steel Overture - Walker (Biped), 5 Blocks High. Fires cannonballs.
Thorium Caprice - Walker (Biped), 5 Blocks High. Uses twin Thorium Revolvers.
Meteor Sonata - Walker (Biped), 5 Blocks High. Jetpack (50% Power), 2% Damage Mitigation. Fires Meteor Shot at pistol speed, as well as having a Starcannon special attack with a long cooldown.
Cobalt Concerto - Walker (Biped), 6 Blocks High. Wings (100% Power), 6% Damage Mitigation. Fires
Palladium Beat - Walker (Quadraped), 6 Blocks High. Wings (100% Power), 8% Damage Mitigation. Features sword slashes and a 1-tier power shield similar to Solar armor for dashing.
Mechanized Duet - Walker (Biped), 6 Blocks High. Wings (150% Power), 12% Damage Mitigation. Twin's laser and chainsaw arm.
Plantara's Elegy - Walker (Quadraped), 7 Blocks High. Wings (150% Power, 14% Damage Mitigation, attacks with Spore shower fired from above and left to drift, and launching Plant Vines like Golem Fists.
Interstellar Seranade - Walker (Quadraped), 12 Blocks High. 18% Damage Mitigation, Laser Beam from below and laser gatlings for directed combat.
Lunarian Solo - Walker (Jet Propelled), 10 Blocks High. Full Flight Capability, 20% Damage Mitigation, Focus Blade (Melee attack similar to the Arkhalis, Homing missiles and vulcan minigun shots for ranged attack. Defaulting uses Master Ninja Gear to dodge and evade.
New Turret Weapons - The new ranged and melee turrets that could work. As expected, the summon items are all tools of some kind!
Popgun Projector - A wooden wrench? What?
Creates the Popgun Turret. Popgun turret fires balls with sizable knockback but little damage.
Siegemaster's Calibrator - Required to do some calibrations.
Creates the Catapult, which lobs large rocks at an arch. Rocks have similar physics to the Rolling Boulder trap.
Molten Pipewrench - A wrench that emits great heat.
Creates the Inferno Turret, a low-tier flame projector.
Familiar Fender-Denter - A black wrench that seems oddly familiar...
A TF2 Reference! Creates a Lvl 1 Sentry in a position. Over time, the Sentry evolves, eventually reaching Level 3 and gaining new attacks as it levels!
Destroyer's Collar - Grabs ahold of mechanized monsters for your own amusement!
Creates the Strange Bumper, a round device out of Destroyer parts that bounces off enemies that walk into it violently.
Golem's Visage Parts - Allows for placing the ghastly visage of the Golem.
Sets up a Golem head that fires eye blasts faster as it sits in position.
Martian Tesla Mounter - Carried by Martian Engineers.
Places one of those nasty Tesla Turrets down under your command!
Mounted Megashark Stand - It's best not to ask how this happened...
Places a Megashark that fires Lunar Bullets in position, to rapidly chew through enemies.
Mounted Combat-related Accessories
Mech Pilot License, Grades F->D->C->B->A->S->SS->SSS
An accessory craftable to add subtle buffs to the Walker mounts specifically. Upgraded with various items found in progression, and the buffs only activate when Mounted. Buffs HP regen, movement acceleration, damage mitigation,
Targeting Sensors
A late-progress accessory that offers ally/enemy sense when mounted.
Machinery Overclocker
Increases a Combat Mount's attack speed significantly.
Special Fuel Mixture
Increases movement speed and flight time of Combat Mounts.
Turret Minion related Accessories
Tinker's Toolbox
An accessory that grants Turret Minions increased numbers
High-Strength Parts
Increases the duration of Turret Minions by 50% (or 100%?)
Pulse Drive Gadget
Creates a pulse occasionally from all Turret Minions that knocks them back and deals a quarter of the minion's damage.
Monster Bait Stick
An accessory that subtly draws minions to aggro at turrets instead of players. Can be overwritten with player armor that offers increased enemy aggression.
Firework Handler's License
Increases the power of Rocket based projectiles. Useful both for the nut in Shroomite that goes for the Stynger as well as the Engineer.
Turret-based Engineer Armors
Engineer's Overalls
Base armor for an Engineer, granting increased amount of Ranged damage and lower enemy aggro towards them.
Technician's Exoskeleton
A late-game armor for an Engineer, granting increased amounts of Turrets and damage as well as a personal turret as a set bonus.
Combat Mount-based Engineer Armors
Steampunker's Overcoat
A low-tier piloting outfit, offering some general buffs for a Mounted warrior. It's set bonus would be hightened regeneration when Mounted.
Pilot's Softsuit
A late-game armor for Pilots, that offers greater buffs for Mounted combat. It allows a Heroic Sacrifice buff, allowing for a mech pilot to survive a fatal blow with a small amount of HP and a reactor explosion effect on death, doing great damage to nearby enemies. 5M Cooldown. Enemies are also more likely to target you.
I'm so mad right now... Nah dude, everything is cool, lol. I was just letting you know, I'm not too fond of boss ai coding... 
