Ibb and Obb is an interesting and clever puzzle-platformer; it also sucks if you want to play it by yourself. Ibb and Obb was designed with cooperative play in mind and, while you can play the entire game solo, doing so will leave you bald after you rip out every strand of hair due to frustration--it's not too difficult controlling both characters at the start, but the difficulty ramps up real fast and, unless you're a masochist or have magical fingers, I don't recommend trying to play Ibb and Obb solo for more than just the first few levels.
So, yeah, Ibb and Obb may suck at single-player, but it is great at co-op and demands both players work together in a way that makes solving puzzles rewarding for both people involved. Both characters are always on screen--guess their names--and can maneuver between two parts of the world where gravity is reversed. Puzzles start off simple--one player jumps on the other and then both jump so one player can reach high places--and then get complicated soon after--you'll find yourself dropping from great heights, propelling each other through portals, interacting with the environment and performing acts of precision that may just leave you saying, "I can't believe we just did that." There's a great feeling that comes with figuring out a puzzle and executing the solution--Ibb and Obb reminds me a lot of Portal 2's co-op, which is a good thing because Portal 2's co-op was great--but the requirement of precision is also somewhat problematic; playing with strangers is hit or miss in terms of cooperation.
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