Weapons definitely take center stage so here is a quick overview how and when to use certain types. Don't get caught up just with guns, or Jack will end up in a world of pain:
Knives are great for melee kills from up to 10 yards away
Flashbang grenades temporarily stun enemies
Reactix pills slow down time and med kits replenish health
Explore the galaxy in the franchise's first open-world game.