Zero Hour is a tactical FPS for PC (Steam) built around online team-based missions, co-op play, and PvP modes. According to the official page, the game supports cooperative operations for up to 10 players or solo play with up to 9 AI squad mates.

The action takes place across various locations in Bangladesh recreated at real-life scale. Players take on hostage rescue, bomb defusal, and 5v5 deathmatch missions, using a planning table to coordinate their approach and interacting with story-driven NPCs.

The official description also lists more than 18 maps, over 23 weapons, and 18 utilities. Weapons can be customized with rails, sights, and foregrips, magazines can be checked and repacked, and doors can be breached in several ways, including kicking, a door rammer, C2 explosives, and back kick combined with grenades.