A Counter-Strike: Source update is available and will be applied automatically when Steam is restarted. The changes include:

Counter-Strike: Source

• Added Counter-Strike bots. For a more detailed description, click here


• Added new bomb defusal map de_tides


• Updated version of de_cbble to allow bots to navigate ladders


• Updated version of cs_office. Fixes minor issue with projector


• Updated version of de_dust2 to allow 40 players


• Optimization to the way that dynamic props are checked. On higher end CPUs, this can result in more than a 5% total frame rate increase


• Fixed bug where players would get twice the normal money at the start of a round


• Weapon models are now checked at startup to make sure they are within limits for size


• Fixed a bug that would allow a player to throw two flashbangs at once


• Added “motdfile” cvar, which sets the filename for the message of the day on the server


• Fixed logic that will automatically kick players for killing hostage or being idle for a long time

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FEATURES OF THE NEW COUNTER-STRIKE: SOURCE BOT
More Realistic Human Reactions<

The CS Bots now have an enhanced "attention" system that takes into account gunfire, cover, distance, motion, and posture when determining whether a bot "notices" another player. For instance, previous versions of the bots would always notice an enemy if they had a clear line of sight to them and they were in their field of view, even if that enemy was crouched and hidden half behind a crate hundreds of yards away. The CS Bots notice moving players much more often than stationary players, and the chance of noticing players in their field of view drops further the more cover the enemy is behind and the farther away they are, among other factors. This brings yet another level of strategy to the bot game, making stealth and positioning much more valuable.

The CS Bot now has two states of attentiveness: normal and "alert." If the bot has been attacked or has seen an enemy recently, it becomes "alert" which increases its chances of noticing future enemy activity, further enhancing the value of stealth tactics.

If a CS Bot is attacked by an enemy it cannot see and didn’t expect, it will "panic" in a much more humanlike manner than did earlier versions. Panicking bots look around wildly for their attacker and often retreat to cover while doing so.

Improved Tactics

The CS Bots understand the flow and timing of Counter-Strike much better. Not only can they "rush" more effectively, but they also know approximately where to expect the initial encounter with the enemy team allowing them to take up defensive positions appropriately and throw grenades at the right place and time. CS Bots are much more attentive to noises made by the enemy, as well as important events such as friendly casualties. Additionally, the bots use stealth more often, such as sneaking into a bombsite to defuse the planted bomb. They are also smarter about prioritizing enemies when confronted with several possible targets at once. Also, when low on cash, they will now save their money instead of squandering it on extra ammo and grenades.

Improved Navigation

CS Bots are more adept at navigating narrow ledges and other tricky areas. In addition, they will shoot out breakable objects such as windows before they actually reach them, which can save precious seconds when rushing the enemy.

Snipers

Bots are now aware of enemy snipers, and will warn their teammates accordingly. Also, they realize that standing still in a sniper’s line of fire is a bad idea, and will often retreat behind cover while dodging when presented with an enemy sniper. The actual aiming and sniping behavior of the bots has been made more humanlike as well.

Grenades

The CS Bots are far more proficient at grenade throwing than they have been before, and throw their grenades in more tactically intelligent places. The bots attempt to retreat from incoming HE and Flashbang grenades as well. If a bot is blinded by a Flashbang grenade, it behaves in a more believably human manner, typically retreating and sometimes firing blindly while doing so.

Other Features

• In addition to the normal bot_quota system, the host can set bot_quota_mode to "fill." This changes the bot_quota into a minimum number of players required for the server. As human players join, bots will leave. For instance, in fill mode if the bot_quota is 10, the server will have 5 bots on each team. When a human player joins the CT team, a bot will leave. If 10 humans have joined, all the bots will be gone, and yet more humans can still join. Only when the number of players drops below the bot_quota threshold will bots begin to re-join the game.


• Players can turn off the bot’s "auto following" behavior to prevent bots from deciding to follow players on their own.


• Bots no longer fall from ledges and cliffs when in combat


• Bots buy equipment and weapons more quickly (for those who prefer no freeze time)

The Counter-Strike: Source Bots were developed in conjunction with Turtle Rock Studios.