Part 1 in a series on the available technology in the setting of Mecha RtD.

Kinetics/Ballistics:
Guns have been, and are still the defacto weapon for pretty much anything. No crazy super-bullets have been designed that can kill with a single shot. Most guns still use an explosive charge to propel a metal slug forward, as they have for centuries before. Only difference is that now the bullets are about the size of your forearm, instead of your finger.
Railguns are the best thing since sliced bread in my opinion, but the science behind them still hasn't quite caught up with the badass factor. Railguns are more deadly than an explosive propelled gun will ever be, but generating the electricity required to fire a railgun takes a medium-heavy or heavy mech. And that's not even considering the recoil. And more than one is ridiculous, end of story.

Energy Weapons:
Weaponized lasers are pretty commonplace. Any kind of mecha can use them, no recoil, pretty damn accurate. They make decent sniper weapons, except for the relatively low penetration power. Power cost is lower than both plasma weapons and railguns.
Plasma. Oh boy, where to begin. First off, plasma weapons are still in their infancy. The theory has been hammered out fine, the problem is putting it into gun form. It isn't impossible to have a plasma weapon, just don't expect it to be a super-refined death machine. Expect it to be an experimental frankenstein half held together with duck tape. Not to say that it won't be effective; plasma weapons would be dangerous, just fragile and unstable.
Plasma weapons I'm willing to give a slight buff to. Consider them "Expirimental" rather than "Held together with duck tape and prayer."
Shaped Energy. Ha, no. Science hasn't gotten that far yet. It's one thing to launch a glob of plasma or a bolt of lightning at the enemy with reckless abandon. It's an entirely different matter to form it into a sword, or claws, or anything of the sort. This means you MLC.
Okay, I've changed my mind here a little bit. Shielding, as in geometric energy shields of a certain, set shape, are fine. So you can have a big square energy shield strapped to your arm or what have you. Basic geometry is good, anything complex isn't. That means no wraparound shielding.

Explosives:
Missiles. Tracking systems have naturally become more sophisticated, so missiles will be more accurate. Sadly, explosives have not progressed as much. You want a bigger boom, you'll still need bigger missiles. Be aware that missiles CAN be detonated while still on the mecha.
Grenades. Unpropelled explosives, unlike missiles, HAVE become fancier. You can have pretty much anything for these. EMP, chaff, napalm, HE, fragmentation, liquid nitrogen, jamming electronics, whatever. Just use good judgement. No black hole grenades.

Melee:
Bladed Weapons. They have guns. Giant robot guns. Generally, swords aren't used much, just because you will be shot and killed with a gun if you try to. Any Mecha that are going to charge straight into battle on the frontlines should not have a sword. Knives on the other hand, are a good idea. Having a knife for melee or utility or just as a backup is a sound idea. As for what types of blades there are, fancy alloys or metals or whatever are fine, vibration blades and the like are stretching it, so try not to use them. I guess I'll accept a virbato blade, but I'd prefer not to. Energy swords, straight up no.
Okay, if you're going to have the energy sword be a flaming plasma blowtorch, rather than something more akin to a lightsaber, then I'll allow it. And nevermind that my own Mecha has swords.

Setting: This is two years after RtD - Blue. There was a big disaster, the world is wrecked. The only real company maintaining order and technology is NovaCorp. They invented Mechas and the reactors and drives needed to power them. There are a couple manufacturers besides NovaCorp making mecha weaponry, but NovaCorp is the only one making actual mechas. Noone "made their own mech in their mom's basement" or as a side hobby, or something like that. Your mechs have been bought, stolen, found, or whatever else. Not made.

You guys are gonna have a limited supply of munitions and parts. You're all on an aircraft carrier, as part of a sort of private army. Firing off 20,000 missiles at a single enemy will use all your missiles. Keep this in mind.

Superweapons are meant to be a "Aww ♥♥♥♥, I'm in a corner with a broken leg, time to ♥♥♥♥ some serious ♥♥♥♥ up so that my allies can rescue me" type of thing. Keep that in mind.

MECHA TYPES. Oh holy jegus, you guys are bad at this. I have approx 4 lightweights, and only 2 actually heavy mechas. I'm dividing this up a bit. The group will have 2 heavy, 2 medium, and 2 light mechas. Balance, damnit.
Light Mechas: 20-40 tons, 7-10 meters
Med Mechas: 40-70 tons, 10-14 meters
Heavy Mechas: 70-100 tons, 14-17 meters.
I'm okay with going a bit outside this. A medium mecha at 72 tons is fine. A medium at 31 tons is not. Use common sense for this stuff.

Any and all questions, ask at will. I'll be editing the char sheets you guys submit a bit, just for balance etc, but try not to go too nuts. In general, if you don't see it being possible in 30 years, then it won't fly here.

Pilot
Name
Vladimír Shurla
Age
29
Physical Description
About 5' 10" and 150lbs. Skinny but well built. Broad face with high cheekbones, and brown hair. Fairly pale skin tone, like someone who's out in the sun a lot, but the sun isn't very intense.
Backstory
While Vladimir was born in Slovenia, he is a citizen of no country, and holds no loyalty to anyone but himself. He was born about 27 years before the events of the Armageddon, and had lead a tough life before then. Both of his parents were killed before he turned 13, and he had to learn to survive on the streets. He quickly joined one of the local gangs, and learned that honor was only used by those who wished to die very quickly. Using treachery, deceit, and backstabbing, he quickly rose through the ranks and was the head of his gang by the age of 18. Realizing that there was more to life than killing in the alleyways of polluted cities, he became a mercenary for hire, where he killed on the “civilized” battlefields for pay. He travelled the world, fighting for the warring factions that were common in the years before the Armageddon. Less than a week after the Armageddon, he and a few other mercenaries went on a self-motivated raiding of a Mecha facility. They managed to make off with a few of the lesser Mechas, and the crown jewel of the facility, the Goliath Mk.IV. Vladimir went into hiding for about 6 months, during which he upgraded and tweaked the Goliath’s armor, weapons systems, and engines using black market parts. For the past 18 months, Vladimir has been forced to remain in hiding, where the only real experience he’s had is in training simulations and mock battles with other mercenaries. However, it’s finally safe for him to emerge, and he has recently joined up with six other Mecha pilots…

Mecha
Name
Goliath Mk.V
Height/Weight
19M/112 Tons
Physical Description
A Mecha design in development since before Armageddon. The engines, weaponry, and armor have all been updated to the newest, but the chassis has been kept. It's extremely heavy and large, designed primarily for support roles and large scale assaults. Originally painted Camo Green, the color scheme has been updated to a more suitable Desert Camo, although it's still difficult to conceal a 62' tall Mecha. It's capable of holding its own against several Mechas in a head-on attack; however, it's more suited to supporting other Mechas, since they can protect its backside. The cockpit and weaponry are mounted on a 360-degree swiveling base, underneath which is a hexapedal base, allowing for movement over extremely rough terrain. However, this configuration means it is incapable of using any sort of additional propulsion methods, such as jets, and is very slow as a result. It often arrives after battles have begun, but is capable of changing the tide once there. The cockpit and legs are heavily armored, accounting for most of its weight. However, the underside of the chassis has only light armor, and is vulnerable as such.
Classification
Super Heavyweight
Combat Role
Slow Moving Assault/Support
Primary Weapon
Two heavy cannons, on separate tracking and movement systems, capable of accelerating high density depleted uranium slugs (20kg) to Mach 2. Accuracy is superb if all are targeting the same object, decreases exponentially if targeting separate units and Vladimir has to deal with additional input and divide his attention between them.
Secondary Weapon
One Hellfire missile system. Packed with 48 missiles of medium size, guided by area designation, it's a fire and forget system. Pick a rough area to bombard, and hit the fire button to launch all 48. Useful against large, stationary units or buildings, not effective against moving targets. Capable of being reloaded, but it's a long and tedious process taking up to three turns, during which the weapon is useless.
Abilities
Heavily Armored: The top of the line plating and armor layering on the majority of the Goliath provides superior protection against all types of attacks. However, this greatly reduces the agility of the Goliath (+1 to defense rolls, -1 to dodging attacks)
Depleted Uranium Slugs: The use of Depleted Uranium as an ammunition is somewhat uncommon nowadays, due to the rarity of Uranium. However, it's still a potent weapon, especially against lightly armored units (+1 to attacks using the main guns)
Morale Boost: The sight of this terrifying beast lumbering over the horizon is strikes both fear into the enemies and pride in the allied forces, knowing that the Goliath has changed the outcome of battles that were thought unwinnable (+1 to all allied rolls at the beginning of the battle, or when the Goliath arrives on the battle scene)
SuperWeapon
Ypsilon Strike: Floods Vladimir's system with massive amounts of adrenaline, allowing him to operate at twice his normal capacity for one turn, and runs the engines into overdrive. He can now use both Heavy Cannons with pinpoint accuracy even when targeting separate units and the reloading systems operate with amazing speed, allowing him to fire both three times in one turn. He can also take control of the Hellfire missile system, and ensure that all missiles hit their target, no matter what the size or speed. All of this culminates into one devastating barrage of death for whoever is unlucky enough to gain his attention and wrath.

Massive crushing fist of doom

Rocket Launched Body Parts