"The Coriolis Effect" focuses highly on the use of the crossbow which is in my opinion one of the more underrated weapons of HL2. It feature out- and indoor / long- and closerange combat, some crossbow puzzles and lots of settings to explore as you play as Gordan Freeman who is trying to infiltrate and recapture an overrun rebel outpost. The Coriolis Effect is part of the PlanetPhillip.com "CrossbowVille" mapping competition.