Isn’t it just great when you receive an unexpected surprise, a very useful reward for something you do? When playing free online slot machines with bonus games the only problem you might have is the things with the “unexpected” part – you’ll definitely be expecting to get a bonus with every spin you make! But once you get a little lucky and your bonus round starts, you’ll see it’s actually worth waiting for. A bonus game or round (the names may differ, but the idea is always the same), unlocks during the regular gameplay after you have spinned in a certain combination of symbols on your reels. Check out the game’s paytable to see the winning combos for your current game.