This freeware game called Shining Blood was created by Teasoft, which can be described as an indie-level production Armored Core: For Answer. You have 6 mechs to choose from and the objective of each game is to blow everyone else up. Upgrades are purchased in the game though collecting red items that destroyed opponents drop. Gameplay shares FA’s speed, at least seen from the videos. A trial version for the Xbox 360 is available in the xbox live marketplace aside from the PC version available from their website.
You will need to have the XNA Framework and .NET Framework 2.0 installed to play Shining Blood.