The Terminator 2029

In Terminator 2029, you play one of Col. John Connor's Special Operations Group tasked to destroy Skynet. You wear Advanced Combat Armor that has configurable slots for weapons which can be swapped on the fly. The gameplay is first-person but you are restricted to the 4 compass directions (e.g. turning left spins you around 90 degrees). The weapons slot feature is well used as you acquire new weapons and attachments as you progess through the game.