On 2 servers with real players, out of 5 Steam servers that run it now, farms and empty ones included. Checked 03:54 UTC.
cs_rio is a community hostage rescue map. It is not one of the maps that come with the game, so servers send it to players when they join.
Over the last 30 days cs_rio was the #66 map on CS 1.6 Steam servers, with 9 real players on it at any moment on average - 0.2% of everyone playing. It ran on about <1 servers with real players at a time. Right now 25 people play it on 2 servers, most of them on servers in Brazil. It is busiest on Tuesday around 23:00 UTC and quietest on Wednesday around 07:00 UTC.
Right now 25, on 2 servers from the Steam server list. Over the last 30 days it had 9 real players on average at any moment. Fake servers and bots are not counted.
On Tuesday around 23:00 UTC. The grid above shows every hour of the week in your own time zone.
The busiest right now: [((Bruxos))] #PEGA BANDEIRA [CASH]+[SHOP]+[/VIP] @BRXGames (15 players), IMPERIAL PEGA BANDEIRA @BRXGAMES (10 players), Nexus CS1.6 (0 players). The full list is under "Servers running it now", and every server has its own page with its history.
de_dust21,627 players on average
de_inferno207 players on average
de_dust2_2x2116 players on average
de_aztec89 players on average
fy_snow78 players on average
de_nuke71 players on average
de_dust59 players on average
cs_assault53 players on average
de_mirage52 players on average
de_train47 players on average
fy_pool_day45 players on average
zm_foda42 players on average
BR