Warhammer 40,000: Gladius – Relics of War is available for free on Steam until May 26. After this date, it will return to its standard price. The game is not Steam Deck Verified but is categorized as Playable, meaning it may function with some issues on the device. Released in 2018 by Proxy Studios and published by Slitherine, it is the first turn-based 4X strategy game in the Warhammer 40,000 universe. The game has received over 14,000 user reviews on Steam, with 81% being favorable, earning a “Very Positive” rating. The narrative takes place on Gladius Prime, where ancient relics lead to a war for survival. The main campaign takes approximately 10 to 11 hours to complete, while completionists may spend 50 to 55 hours exploring the game.