[TomiHiltunen]

To anyone who have played arcade games and flash games decade(s) ago knows that so many games today are pure retries of older games. Just take a look on the games of Rovio and others. One thing that pops in mind is "I've played this game before". Great thing is that they make the good, original idea of the game more enjoyable with better ramification and execution.

[Pxtl]

I can't stand how people bag on Rovio. Their games are intelligent and fun and even a bit educational (educational content stuffed into Angry Birds Space, and Amazing Alex is great for getting kids to solve problems creatively). Yes, they're derivative, but they add a tremendous amount to their predecessors. Angry Birds is a far better game than Crush the Castle, and The Amazing Alex is the first solidly-good implementation of TIM in over a decade and has a ton of interesting ideas that add to the concept.

And they have only the most minimal inclusion of the In-App-Purchase crap. They don't make cash-driven Skinner boxes.

People bag on Rovio because they were the first big smash hit of the mobile world, not for any good reason.

[TomiHiltunen]

This list is based on my own gaming experience: Angry Birds -> Castle Crusher Amazing Alex -> The Amazing Machine Juice Cubes -> Candy Crush -> Bejeweled

This list is not to demean Rovio. I really like Rovio's execution and I keep playing Angry Birds and mostly Juice Cubes before going to bed. It's nice and relaxing.