Fallout 4

Fallout 4’s DLC has you building robots, capturing creatures for Pokémon-style pit fights

The PlayStation 4, Xbox One, and PC open-world game was the third best-selling release of 2015, according to market research firm The NPD Group, and additional content like this can encourage everyone who owns it to spend more money and prevent them from trading Fallout 4 for in-store credit at places like GameStop.