It's all rigged, technically. If you go to a real life casino, slots are certified to pay out some percentage of plays. It's like, 8%.
If you play craps, roulette - the house always has the edge because there's more results favorable to them.
The only "casino" game where the house doesn't have an edge is poker because that's player against player. The house doesn't really have a stake in any outcome, they're just being paid to host the game.