Metal Wolf Chaos XD

• Invest in machine gun upgrade research until you get the MG200 and then the GG-RH (Richard Hawk's gatling guns). You can experiment with the other weapons but as far as I can tell the top tier machine guns can wreck stuff fast and bring bosses to their knees.

• Railguns at full charge can one shot most bosses.

• The M72A3/BU rocket launcher is hilariously broken because the cluster bombs it splits into can do insane damage when they all fall on targets. This is crazy useful on some boss fights. You can literally kill the cloaked dudes in Phoenix without blowing up the radars because the splash damage will hit them so hard. Just make sure to aim upwards of the target you're trying to hit so the rockets can explode into the cluster bombs.

• Sniper guns will be needed to free some prisoners from their cages. The heavy weapons that explode, burn, and your stomp will kill them.

• Your stomp attack gets stronger the higher you get. When fighting the armored targets that bounce you off, try floating first and then land on it.

• Shoot the statue of Michael's dad. Don't listen to what he says.

• You can shoot the helicopter that hurls insults at you each mission.

• There are new game plus unlocks with weapons having their own criteria and mech skins for doing hard mode missions. You don't unlock anything in the sandbox setting.