Gameloft has just kicked off a Labor Day sale featuring Modern Combat 3, Gangstar Rio, and NOVA 3. These are some of their biggest titles, and they're available for a buck each in Google Play. Sure, they're "homages" to Call of Duty, Saint's Row, and Halo, respectively, but they're all extremely well polished and the closest you'll see to those franchises finding a home on Android.
I've personally put a fair bit of time into Modern Combat 3, and found the accelerometer controls to be really precise once you got used to it. I wasn't a huge fan of NOVA 3, though I never got into Halo either. Any Gangstar Rio players out there? What's your top pick out of these three games?