Rainbow Six PC Game

A cops vs. robbers tactical shooter where as the attacking side, you can use rappelling, reversing, and more. As the defending side, you can reinforce walls, place traps, barbed wire, and barricades to make it difficult for enemies to enter. Additionally, you can utilize operator skills and gadgets. Skills are diverse, allowing for silent assassinations, firing incendiary grenades, and more. There's a mobile version, but I don't recommend playing it.