While trying for 2'50" in Arid Sands I earned enough EXP to upgrade my Combat Level, earning me the "Thrasher" trophy. I was playing after work and not making much progress, so I eventually turned in for the "night".
When I regained consciousness, I cranked up Unleashed again. After a bit, I finally got 2'46" in Arid Sands Act 1, earning me the Speeding Ticket trophy! I decided after that to work on the hot dog stand missions in Spagonia (that was random, wasn't it?). Anyway, I wish they'd combine achievements in these! When I only had to get 500 rings, I finished with 826. Now I have to get 800 and constantly get hit, thus losing rings that I can't make up by the end of the level! I'm also sure I finished some of these within the time limits and with enough enemies destroyed! C'mon Sega, the level is fun but I don't want to play through it at a bare-minimum of 9 times to get a hot dog! Ah well, after a few failed attempts on the "Get x number of rings" level 2 and "Defeat x number of enemies" level 2, I put Sonic up and pulled out Arkham Asylum.