i glitched bloons tower defense 4. no idea how, but here's the original screenshot i took. the circled dart tower showed up mysterously, and i could just keep re selling and reselling it without it disappearing, and i would still make all the money from it.
Complicated to explain but go play it. It's really easy and childish. Like you have to figure out each puzzle. =X http://armorgames.com/play/2153/aether