Another month of Xbox Games With Gold has been revealed as the final days of August approach. In September, Microsoft will once again be delivering a selection of Xbox One and Xbox 360 titles to Xbox Gold subscribers free of charge, two games available at the start of the month and two available mid-September.

Headlining September's games on Xbox One is the popular indie simulation game, Prison Architect. But September's Xbox 360 releases may steal the spotlight with its vintage Sega and Star Wars games. Here's the official line-up for September 2018's Games With Gold:

  • Prison Architect Xbox One Edition (Xbox One)
  • Livelock (Xbox One)
  • LEGO Star Wars 3: The Clone Wars (Xbox 360)
  • SEGA Vintage Collection: Monster World (Xbox 360)

Both Prison Architect and LEGO Star Wars 3: The Clone Wars will be available starting September 1, with Livelock and the Monster World collection being released for free on September 16. Xbox One games will be available for up to a full month, but Xbox  360 titles are limited to just 15 days. That just means Xbox Gold subscribers will have to check in twice a month to make sure and download all of the free Games With Gold releases.

Prison Architect made its debut on PC via Steam Early Access all the way back in 2015, allowing players to simulate the construction and management of their very own prison. Development on the game continued, eventually leading to a final version of the game released on consoles in 2016 (though development continues on PC). For players begging for a modern building game inspired by games like Theme Hospital and Evil Genius, Prison Architect is exactly what they need.

Livelock may be a game that few have heard about, given its relatively quiet release in 2016. Livelock is a top-down twin-stick shooter with both single-player and co-op, akin to an ARPG with guns. Players pick from several different classes and progress through the game's story, fighting to take back a post-apocalyptic Earth and saving humanity.

September's Xbox 360 games may be the most exciting releases this month. LEGO Star Wars 3: The Clone Wars embodies the pedigree of high-quality LEGO games made for kids and families, an action-adventure game that retells the events of Star Wars 3 but with a sense of humor. Within the Monster World vintage collection are three games from the Wonder Boy series, action RPGs where the player travels from land to land, improving their equipment and eventually saving the world.

September's Games With Gold start to become available on Saturday, September 1. Make sure to download the remaining August Games With Gold, including Forza Horizon 2 and For Honor, before they're no longer available.