Spectator is a "team" that does not participate in a game, but is allowed to watch the game's progress. A player enters the spectator mode when the player dies or chooses to spectate the game instead of joining either team.
The team color is white.
In the normal, unrestricted spectator mode, spectators are allowed to spectate living players in first-person (seeing from the perspective of the player), chase cam (the camera following the player) and free cam (the camera does not follow any player, it instead moves when the spectator uses the movement keys and can clip through walls). In first-person and chase cam, the spectator can switch the spectated player to other players by pressing a key (default left and right mouse button).
When using the first-person and chase cam, the HUD of the spectator menu shows the name of the spectated player, their health in a bracket, and their faction by coloring the name and health in team-specific colors.
In Counter-Strike: Global Offensive non-dead player spectators are allowed to use the X-ray by pressing a key (default X). When turned on, the team-colored silhouette of all players is shown through the walls. For instance, a blue aura will display a CT player. Grenade trails are also shown in their respective hues.
additionally player can spectate friends via friends UI from Main Menu, by hitting Right mouse button and selecting option "Watch".
How many players spectate any match in-game is displayed on right corner screen and scoreboard.
In casual matches, dead players are allowed to spectate both their teammates and their enemies, as well as view in either first person, chase cam or free cam. Team chat (both text and voice) is disabled when the player spectates in this mode.
In competitive matches, dead players can only watch their teammates in first person. However, unlike in casual mode, players can chat or use their microphones to communicate regardless of their current status. The HUD for non-dead player spectators in Competitive matches also show the equipped weapon and equipments, health and armor for all 10 players. HUD display also tabel with kills (K),assists(A),deaths (D), Adr, 3 kills, 4 kills, 5 kills , Headshot %,money earned , and objective (OBJ).
In bomb defusal games (regardless of casual or competitive) if the C4 has been planted and the entire Terrorist team is dead, the spectator view for dead Terrorist players will focus only on the C4. Also, when spectating a competitive game, the C4 is outlined in yellow when dropped, red if planted and green when defused.
In game modes that do not allow players to respawn, bots can be controlled by their respective team members who were killed in the same round. This has garnered some controversy, especially in casual mode, as spectating players can see the enemy's position, take control of a bot, and quickly eliminate opponents.
The developers of Counter-Strike have added several restrictions to this system over the years to prevent spying spectators from communicating with those who are still playing. For example, spectators cannot change their names until a new round begins because in early versions, dead players could communicate with living players by changing their names (e.g. "He's at CT spawn" Though the message can still be seen if the Console is opened). Depending on the server's configuration, spectators may or may not have the ability of floating freely anywhere on the map. The default in early versions was to allow the spectators to float freely, but this default was changed later because dead players spied on living players and could communicate through alternative media (most notably voice in case of Internet cafes). Those actions may lead to the accusation of cheating by the opposing team (also known as Ghosting).
Formerly known as SourceTV, the GOTV service offers the ability to have an unlimited number of spectators watching online games based on the Source Engine. GOTV spectators are invisible to players and cannot interact with the running game in any way. The camera view in SourceTV is controlled by an auto-director AI or a human camera man. The broadcast is usually delayed by a certain amount of time. This ensures that the playing teams cannot use SourceTV to get any usable information about their opponents. SourceTV can also record server-side demos that contain the whole game with all entities and events.
- The inspect weapon animation is only visible to the player, s and GOTV viewers in first person, but not in third person perspective.
- Additionally, the inspect weapon animation is only visible to the player in the first person view, and is not visible to the player when using a third person perspective,but still plays inspect sound.
- When spectating a game with X-Ray enabled, a dropped bomb will be outlined in yellow. When planted, it will be outlined with red but when defused, it will become green.
- Spectator(s) can hear both teams radio voice commands/Responses/Reports.
- Spectator(s) see "instantaneous" duck when First person mode is active,no see lowering like during normal gameplay.
- In Counter-Strike Beta 5.0 version, spectators can see "ghosts" could be seen by other "ghosts" as a little luminous ball floating around.
- SourceTV on Developer Valve Software Wiki