Rearmed Trophy in Bionic Commando Rearmed 2
As the primary player, obtain all bionic arm upgrades.
How to unlock Rearmed
Upgrades are scattered throughout the levels, some have 3 or more upgrades.
Don't worry if at first you can't get any, most of them require weapons you get as you go through the game. You can use the Treasure Radar upgrade to help get the rest of the upgrades. You can get it in the "Point of No Return" level. Below is an image with the list of weapons and passive/active upgrades, with the number of the level where they can be found. Remember you just need to find one of each.