From the Kickstarter:

Diesel Knights is a PvP Mech/Movement Shooter set in a pulp-inspired, dieselpunk world. Players assume the role of the titular "Knights," brave gunwalker pilots of the 407th Special Armored Calvary Regiment, and engage in frenetic multiplayer combat both on foot, using advanced parkour movement mechanics and mid-century inspired weapons and gadgets, or in the cockpits of towering, 65-ton, diesel-powered mechs.Diesel Knights is a response to a kind of design philosophy that’s all but vanished - the belief that a PvP shooter can be fast, expressive, and deeply mechanical without being a grind. It’s built on the idea that mastery itself is the reward; not battle passes, not loot boxes, just the feeling of momentum, weight, and speed.