Let me see if I can summarize:
- New mechs cannot be built, and so everything revolves around repairing and refitting ancient machines dug up from a long past era.
- Operating a mech is very complicated and so only an elite caste of people are trained to do it. They are organized as houses in a feudal structure, like how historically you needed the output of several farms and a retinue of servants to equip and support each knight in the field.
- The best way to fight is to try to kill the enemy pilot without damaging the rest of the mech too much, so that you can salvage it for your own side.
- Mechs fall into two categories, BT and AT, where BT mechs are big, heavy, and slow, like battleships on legs, and AT mechs are more agile and can move more like humans do. BT mechs are older tech, but the parts to repair them are more widely available, while AT mechs suffer from a rarity of parts.
- There is a poorly understood enemy out there that corrupts mechs and their pilots and turns them into abominations. We are going to be fighting this thing.
- We are mercenaries working for a company called RUPIC, under a contract that says you fight for them for 6 years, repairs are free, if you die, they keep your mech, if you survive, you'll have made so much money you can retire comfortably.
- Your character should have lost all his/her comrades recently, so you're left now without a lance, and maybe feeling some PTSD and survivor's guilt.
- A good source of information on BT mechs is sarna.net
- Mechs typically operate in small groups called lances. Common roles within a lance are Brawler (optimized for high damage and toughness, like a battleship), Missile Boat (optimized for long range attacks), Skirmisher (balanced for toughness and speed, like a cruiser), Striker (optimized for speed and damage, like a destroyer), Scout (optimized for speed and sensors, to locate enemy positions, like a frigate or patrol boat), Ambusher (optimized for surprise and high damage, like a sub?).
- Mechs are classed by weight: Ultra-light (10-15 tons), Light (20-35 tons), Medium (40-55 tons), Heavy (60-75 tons), Assault (80-100 tons). Typically the heavier the mech is, the more powerful it is in battle, same as in boxing. The lightweights can move fast, but it only takes one power punch from Mike Tyson to drop you. Speed tends to be upwards of 100kph/60mph for the lighter mechs, and closer to 50kph/30mph for the heavier ones.
- Some mechs, like mine, use rockets to jump in the air for short distances, but most of them don't, because jets are heavy and take up a lot of space.
- Mech weapons generally break down into cannons, lasers, and missiles. Cannons are heavy as fuck, including the weight of the ammo, but they can do a lot of damage quickly for very little heat gain. Lasers are very cost-efficient, but they generate a lot of heat, so you can't fire them too often or your mech will shut down. This also includes particle cannons (PPCs). Missiles are a good compromise of weight vs. heat, but the ammo is expensive. Missiles break down into short-range (forward-firing, within 270m) and long-range (arc-firing, up to 600m). Lasers are categorized as small, medium, and large, with the bigger sizes having greater range, damage, and heat. Cannons are categorized by the damage they do (2, 5, 10, or 20), with the bigger guns having shorter range, way more weight, and much more expensive shells (even more expensive than missiles, oddly enough).
- If your mech overheats, it will get very uncomfortable in the cockpit, and then the mech will shut down for safety reasons. If you override the shutdown, it can explode. Heat dissipates slowly over time, depending on how many heat sinks you have. To go from shutdown level to fully cooled takes between 3 and 5 minutes.
- Wishbone is playing a big huge guy who rose up the ranks from commoner to adopted noble, and he pilots a 100-ton assault mech loaded with cannons and thick armour (brawler)
- I'm playing a chick whose home colony was destroyed by the monsters, and she pilots a 50-ton quadruped mech that uses an extended-range PPC to pick at enemies from a distance (skirmisher/ambusher)
- Mister Brown is playing some kind of genetic experiment, it looks like, who pilots a nimble and versatile AT mech with articulated fingers (scout)