this is one the best sandbox games in the App Store you can find cause you can build and save about anything you make I'll guarantee you'll like it if you know how to play the game. There's npc's, car, tanks, building tools, bombs, swords, guns, and robots. it is the best sandbox game in my opinion. (iOS, android, and maybe pc) just please don't add mods they ruin the point of building and making your own stuff. I Recommend  the game if you like sandbox, gore, and weapons.