Danger Zone. Competitive mode, the primary gameplay experience, pits two teams of five players against each other in a best-of-30 match. When playing Competitive, players have a skill rank based on a Glicko rating system and are paired with and against other players around the same ranking. The Casual and Deathmatch modes are less serious than Competitive mode and do not register friendly fire. Both are primarily used as a practice tool. Arms Race and Demolition, both based on mods for previous iterations in the series, were added alongside eight new maps for the modes. Arms Race is the Global Offensive variant of the "Gun Game" mode in other games in the series. Demolition is another bomb defusal game mode, with gun upgrades only given to players who killed an enemy in the previous round. Wingman is a two-on-two bomb defusal game mode taking place over sixteen rounds. Similar to Competitive, players are paired based on a dynamic skill ranking. The Flying Scoutsman mode equips players with only a SSG 08 (known in-game as the "Scout") and a knife in a low-gravity map. Retakes is a gamemode where three Terrorists will defend an already planted C4 against 4 Counter-Terrorists. Players will also be able to choose a loadout card at the beginning of each round to retake (or defend) the bomb site. Danger Zone is a battle-royale mode in which up to 18 players search for weapons, equipment, and money in an effort to be the last person or team remaining. Valve also included an offline practice mode designed to help new players learn how to use guns and grenades, called the Weapons Course. Apart from the Weapons Course and Danger Zone, all other game modes can be played online or offline with bots. There are five categories of purchasable weaponry: rifles, submachine guns, "heavy" weaponry (light machine guns and shotguns), pistols, and grenades. Each gun in Global Offensive has a unique recoil pattern that can be controlled, a gameplay feature the series has long been associated with. Global Offensive also introduced weapons and equipment not seen in previous installments, including tasers and an incendiary grenade. In-game matchmaking is supported for all online game modes and is managed through the Steam platform. The game servers run Valve Anti-Cheat to prevent cheating. One form of matchmaking in Global Offensive to prevent cheating is Prime Matchmaking which hosts matches that can only