This does not necessarily mean they have great tutorials — indeed, many games with awesome learning curves throw you straight into the experience proper.
None of the seven examples that follow are easy games, but all of them meter their difficulty with a well-considered learning curve.
TAKEAWAY: You can simultaneously teach and challenge players at the same time if you weave the learning experience into the environment and level design.
TAKEAWAY: A good learning curve balances danger or challenge with player empowerment; it gives the player a taste of both failure and victory and makes either feel like a learning experience.