If you want to leave Ijat a tip for writing this Counter-Strike: Source guide you can do so here.
Counter-Strike: Source Walkthrough Game Modes: Bomb Diffusal
Counter-Strike: Source Game Modes: Bomb Diffusal
In CSS, there are several game modes available. The most common game mode is bomb diffusal. The maps usually start with name de_*mapname* to identify the game mode.
Each round, one of the terrorist team member will receive a bomb that can be planted at the bomb site.
In each map, there are two bomb sites which is A and B.
For terrorist, plant the bomb at one of the bomb site and defend the bomb from counter-terrorist diffuse it or until the bomb detonate. If terrorist doesn't plant the bomb yet, eliminating all counter-terrorists will make the terrorist team wins the round.
For counter-terrorist, to win the round you have to diffuse the bomb (if planted) or you can quickly kill all the terrorists before they plant the bomb.