One evening, as Foster and the MechWarrior (player) are returning to their workshop, mysterious craft enter the Dante airspace and a Stiletto BattleMech lands on the ground and starts searching for them.

They successfully evade the Stiletto and make it back to the workshop, where Nat instructs the player use a new powered armor suit called the BattleArmor to stop the invaders.

MechAssault 2 was created with an "totally reworked and distributed" engine, allowing the developers to introduce graphical enhancements to specularity and bump mapping not present in the original game.

[4] The developers aimed to strike a balance in the design of MechAssault 2, intending to "stick as closely as possible to the pick up and play style of the original", whilst "introducing a few new twists" to the single-player and multiplayer modes.

[13] The Times gave it a score of four stars out of five, saying, "Experienced gamers will have a blast in cyberspace, battling with other players from around the world, which pretty much justifies the cost of broadband on its own.

"[22] However, The Sydney Morning Herald gave it three-and-a-half stars out of five, saying, "There are sufficient missions but little choice of objectives, ensuring the action starts to feel prematurely repetitive.