SONIC UNLEASHED

As usual, there are day and night challenges:
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Daytime
Battle--there are plenty of robots in the final part with the aerochasers but they ask you to defeat an absurd amount of enemies for level 3. Not too difficult though.
Rings--Also a huge number but manageable. In the final portion of the level with the aerochasers as you round the first right turn on the rail portion the leftmost robot has something like a 30% chance of hitting you with his lasers if you're on the middle rail. Being on the right rail doesn't help this as the rightmost robot is firing his lasers as well. There is really no way to predict this nor escape it if it is happening so just watch out for that and get the rings back on the next portion of the level.
Time--If you know the right path it is very manageable, the part with the quick sidestepping in the alleyways might have to be memorized (lb, rb, rb, lb, rb, lb, lb, rb) and the quicktime jumping button sequence on the clock tower is always B, A, X.
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Nighttime
Ugh, there are a lot of places late into the level where you can die easily from falling to your death but otherwise the level is completely manageable in both the time attack and survival modes.

Day time stages, rings challenge.

Stick to the left side. As soon as you see rails stop boosting. After you get to it immediately boost and change to the middle rail. This method works always.