The promised free-play weekends are now underway on Steam for Lead and Gold- Gangs of the Wild West, Fatshark's wild west-themed shooter, and Shattered Horizon, the zero-G shooter from Futuremark Games Studio. Both free weekends will run through 4:00 pm EST on Sunday, and each game is on sale at 50% off (including four-packs), and there's also a Frontiers Pack bundling both games for an additional 29% discount off the individual sale prices.