Pick the one you want the beat first, I included a 3 stars walkthrough for every time trial.
ArlandAtrium OneAtrium TwoBurfieldChaseConvoy OneConvoy TwoCranes OneCranes TwoEdgeFactoryFlightHeatNew EdenOfficePlayground OnePlayground TwoPlayground ThreeShard OneShard TwoStormdrains OneStormdrains TwoStormdrains ThreeDLC Levels (thx ovendonkey !)ActinoActino RiseChromaFlowKineticRazzmatazzReflexSynesthesiaVelocity