Not long after, Nexon replaced most of them with their own versions. During its early development stages, all stock sound files such as the knife and radio commands from Counter-Strike: Source were used as a placeholder.Counter-Strike Online 2 featured new icons for multiple kill styles from Double Kill (2 kills in a row) up to Godlike (10 kills in a row), including Wallshot (wall bang).Counter-Strike Online 2 uses Source 2010 engine, similar to the one used by Counter-Strike: Source.In real life, this is considered impractical and defeats the purpose of sniping. In the trailer, Mila is seen firing a sniper with an attached laser sight.One of the characters shown in the trailer, Mao appeared a few times long before he was introduced as a purchasable class for the Terrorists.Key Player (saving a teammate from getting killed)ДЄchievements Main article: Achievements/CSO2 System Requirements.One Shot Three Kill (three kills with one shot/grenade).One Shot Two Kill (two kills with one shot/grenade).Assist (enemy finished off by team mate or suicide).Jumpshot (kill while jumping or mid-air).Wallshot (kill through the wall or an obstacle).Headshot (kill by shooting at the head).In addition, new icons are presented whenever a player kills with a: Different than CSO that only counts until multi kill (Except Human Scenario), the kill system in CSO2 expands:

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