What is not a default game mode in Counter-Strike (2000)?

Arms Race is not a default game mode in Counter-Strike 2000 because it was introduced later in the Counter-Strike series. The original Counter-Strike 2000 release featured game modes like Bomb Defusal and Hostage Rescue, where players competed in teams to either plant or defuse bombs or rescue or prevent hostages from being saved. However, Arms Race was added in later versions, which is a fast-paced game mode where players progress through a predefined list of weapons by getting kills, aiming to be the first to reach the final weapon.