Street Fighter Puzzle Spirits [Free] is actually a couple of years old now, and only just arriving in more countries worldwide. In some ways, it feels its age. It's less refined than the usual spins on Puzzle & Dragons [Free] we see these days, giving it the feeling of something that was slapped together to cash in on a craze before the tide went out again. It initially comes off as crudely simple, but if you give it a little time, that basic simplicity gives way to a very satisfying set of mechanics. Unfortunately, one other way shows the age of this game. While many social RPGs have loosened up a little on the monetization squeeze in recent times, Street Fighter Puzzle Spirits has its boots firmly planted in the past. On your throat. What remains is a fun game that can get frustrating in a hurry if you're not willing to pay up. Yes, even more so than usual. There are two main choke points in Street Fighter Puzzle Spirits. First, each round takes up a significant portion of your stamina gauge. Early on, when level-ups are plentiful and bring stamina refills with them, this isn't a big problem. Once those salad days are over, it's not uncommon to wipe out your whole meter in three or four rounds. The second big problem is in the difficulty curve. After a gentle tutorial and fairly breezy early set of stages, you'll hit your first serious boss in the form of Ryu. Unless you take some time to grind up in earlier fights, you probably won't be able to beat him. When you fin...