When we played Frontlines only two maps were available, but they couldn't be more different in terms of content. One was a huge, open environment, packed with tanks and some of the fastest jeeps we've ever seen, favoring snipers, air support options and heavy weapons men. The other was a dense urban affair, full of skyscrapers, but also sporting a few jeeps for fast movement. Certain bits of each environment are destructible - and chucking a cluster bomb throws up cumulonimbus-sized clouds of dust - but you won't knock buildings down, Mercenaries-style.
One of Frontlines' most interesting features is the amount of on-the-cusp-of-happening technology crammed in. Favorites include the distance-specific airbursting grenade, the air-sucking clusterbomb and the remote railgun emplacements.