"All flesh is grass," goes the popular saying (listen for teens chanting it as they skip to school). The conflict of Plants vs. Zombies revolves around this sentiment (look for it stenciled on alley walls), and it's tragic. Plants are irate that zombies won't let them sink their roots into their festering flesh for nourishment. Zombies believe plants are denying their role in this cycle, and want to devour plants so seeds will sprout in their rich guts and burst forth splitting their ribs like mouldering sepals.
Garden Warfare is PopCap's unexpected multiplayer shooter spin-off from the fab tower defense Plants vs. Zombies. It's not the easiest idea to sell people on, especially given how big a shame it is that we haven't got more proper PvZ on PC, but I do hear some good things about Garden Warfare. A trial's tempting.
If you fancy a crack, the trial is available through Origin. It offers the full game, but limits play time to ten hours (only ticking down when the game is running). The trial's on another timer too - only available for the next two weeks.
Some may think that I'm overthinking this, that Garden Warfare is simply a game about pelting fruit at your pals. No, that's FRuiTDooM.