Hidden among Strasburg's thicket of spindly trees, patchy grass, and dirt fields, castles and wooden forts stand strong while flying saucers hint of an alien invasion. This is all part of Skyline Paintball's battlefield landscape, which includes twelve fields such as Mars Attacks and Frontier Fort. Before slinking through trenches and underground bunkers, players load up on fresh paintballs by Kee and GI Sportz, sold by Skyline onsite. Refs oversee matches to ensure everyone understands the finer techniques of pointillism and that no one uses a marker that fires faster than 280 feet per second. Less experienced players who rent equipment play in separate games from more experienced players who own their equipment, helping ensure games are evenly matched. Players can walk on during open play each Saturday and Sunday during which up to 20 players can sling rainbows of paint throughout strategy-laden matches. For paintless competitions, Skyline also hosts laser tag sessions.