The game industry give a big apportunities. Gamers spends a lot of money for games and in this industry there are a lot of money.
The problem is that to get this money you yourself must first start investing something. That is why ICO is being conducted.
By the way, some games are made based on crowdfunding. But usually this is done after the demo version of the game or if there is a team that already has experience in creating games.