Seekers gain hp by hurting or killing a hider. Seekers either lose some health (default 5 hp) on every shot or hiders get more invisible everytime they get shot - or both. They have to search for the hiders and shoot them. The CTs 'Seekers' wait a specified time to give the hiders a chance to find their spot. Terrorists 'Hiders' choose a random model on spawn, like a chair, plant or a sign, which is common on the played map and search a place, where they blend in best.