Robot is a versatile character that can eat weapons in a pinch, giving it a free mini pickup of ammo or hp. Robot also finds better weapons earlier. Robot finds better weapons earlier than other characters. Weapon drops are calculated off of the difficulty number. Difficulty is the number of portals you entered, it determines the amount of enemies spawning in the area. If a weapon is meant to drop on difficulty 11 that would mean the weapon drops in area 5-3 from enemies, 5-2 from Weapon Chests