CS2 basics: what changed since CS:GO
The short answer: the core game is familiar. Two teams of five compete in rounds, with money limiting what each player can buy. For viewers, the biggest change is shorter maps, with at most 24 rounds before overtime, compared with 30 in CS:GO. Smoke grenades behave differently too, and the map pool has changed. As of November 2026, it is Ancient, Anubis, Cache, Dust II, Inferno, Mirage and Nuke.
A map, round by round
A match consists of one or more maps. On each map, the Terrorists try to plant the bomb. The Counter-Terrorists try to stop them. The teams swap sides halfway through the map.
As of November 2026:
- Before overtime, a map has at most 24 rounds. The first team to win 13 rounds wins the map. This applies at the Majors, in the game's Premier and Competitive modes, and at ESL's events.
- A round lasts 1 minute 55 seconds at ESL's events. Once the bomb is planted, it explodes after 40 seconds unless the Counter-Terrorists defuse it.
Overtime
If the teams are tied after 24 rounds, they play overtime:
- Six more rounds. The first team to win four of those rounds wins the map. The teams swap sides halfway through.
- Money is reset. Every player starts each overtime with 12,500 dollars.
- Repeat until a team wins. If an overtime ends in a tie, the teams play another.
These are ESL's overtime rules as of November 2026. Valve's August 2023 post about CS2 set six-round overtime for Premier, Competitive and the Majors.
The economy
Money makes planning part of CS2 alongside aim. Each player has a separate budget to spend on weapons, armour and grenades at the start of each round.
- The first round is a pistol round. At ESL's events, as of November 2026, players start the map with 800 dollars, which leaves little to spend.
- Round outcomes bring money. What a team earns depends on how the round ends. Players also earn money from kills and from planting the bomb, even if the other team defuses it.
- Losing still pays. A team that loses a round gets a loss bonus.
- Survivors can keep their weapons. A player who survives a round usually carries their equipment into the next. There are exceptions: for example, nobody carries weapons into overtime.
These limits explain the buying decisions commentators describe:
- A full buy: the team has enough money for rifles, armour and grenades for everyone.
- An eco round: the team buys little or nothing so it can afford a full buy next round.
- A force buy: the team spends what it has on cheaper weapons, because it can't afford to lose the round.
The map pool
As of November 2026, Valve's competitive map pool, called the Active Duty map group, contains these seven maps.
- Ancient
- Anubis
- Cache
- Dust II
- Inferno
- Mirage
- Nuke
Valve updates the pool from time to time, usually replacing one map at a time. In 2026, Anubis came back in January, in place of Train. Cache joined in July, in place of Overpass.
The same pool applies in Premier, the game's ranked mode, and at the Majors. Before each match, the teams take turns removing maps and picking the ones they want to play. CS2 formats explained: best-of-3, Swiss and brackets covers how.
What changed from CS:GO
- Shorter maps. In CS:GO, a map took 16 round wins. In CS2, it takes 13, with at most 24 rounds before overtime.
- Smokes that move. Smoke now fills the space around the grenade: it spreads through doorways, up and down stairs and along corridors. Bullets and HE grenades can push the smoke aside for a moment and open a line of sight.
- Shots count when they happen. The server now knows the exact moment a player moves, shoots or throws, rather than checking only at fixed intervals called ticks. Valve calls this sub-tick.
- Maps that look different. Many maps have been rebuilt or relit in the new engine, Source 2. At CS2's launch, some, such as Dust II, kept the same layout and received lighting improvements only.
The Majors have changed too. CS2 Majors explained: format, invitations and stages explains their current format.
Ready to watch
These basics are enough to follow a match again. To choose one, use "What should I watch?" on the home page. For ways to avoid learning the result before you watch, see Watch CS2 VODs without spoilers.