A great paintball player possesses the strategic mind of a general, the sharp eyes of a sniper, and the protective blubber of a navy seal. Clap your flippers for today's Groupon: for $20, you get open-play admission (a $15 value), rental gear (a $15 value), and 200 paintballs (a $10 value) at Vintage Paintball Park in River Falls (a $40 total value). The park is open on weekends from 10 a.m. to 5 p.m.

Color-slinging combatants at Vintage Paintball Park dart through numerous playing fields outfitted with urban barricades, airball-style inflatable fortification, and natural wooded terrain. Today's deal grants paintballers all-day open play and equips them with a marker (gun), tank, unlimited compressed air, hopper, and protective goggles, plus 200 paintballs—the exact number used to annoy Xerxes at Thermopylae. Once fully equipped, players take to one of seven playing fields with newly met comrades, adversaries, and olive-branch wielding refs. Take cover in the woods's trenches and pillboxes or scurry along one of the urban field's catwalks before ducking into a guard tower or seizing the high ground in a multi-level building. Amid the polychromatic combat, trained referees keep players safe by enforcing the park's rules and code of conduct.

Once players have converted their 200 paintballs into victorious eliminations or sticky Monets, they can purchase additional ammo from the on-site pro shop ($20/500 paintballs; not included in today's deal). Players can only use paintballs purchased at the park.