Counter Terrorist Special Forces: Fire for Effect, known in North America as Special Forces: Nemesis Strike, is a 2005 third-person shooter video game by Asobo Studio for Microsoft Windows and Xbox.

The player plays as either of two of the Counter Terrorist Special Forces (CTSF) elite agents: 'Stealth' Owl or 'Immortal' Raptor.

When playing as Raptor, heavy guns, explosives and automatic firearms are used in a frontal assault tactic.

The Hoverspeed is a massive vehicle only Raptor can drive which enables access to any terrain, also mounting a machine gun that can be controlled alone or when Owl is on board.

When in free-fall, the player can speed up and attain streamlined body which enables quicker reach to the required height while leaving Owl vulnerable to attacks, or looping in free-fall to dodge any shots fired by enemies.

A drop mission has enemies who are also in the sky with Owl as they gun him down, which the player can engage in combat up in free-fall.

In the last few levels Owl also destroys a bomb in mid-air where the player simply shoots at designated spots.

The game begins with a speech by the World Council President speaking to senators in regard to the CTSF and their work.

Thanks to the Proteus Project that the council had voted for an artificial intelligence unit, Thesis, the CTSF's AI has been baptised to serve the CTSF with its fight against terrorism, with 90% accuracy and no news of terrorist attacks in the last six months.

It is then seen that due to the geopolitical climate no longer steady, the council has voted that Thesis be reassigned to military research, which exasperates Banner.

Owl is handling his recruits when then he and Raptor are called in by Tracy, the head in communications, for officer's evaluation.

Raptor heads to an unused dock where the terrorists are located and finishes the choppers escaping, with a heavy frontal assault attack using the element of surprise.

Somehow, when Owl arrives in the control room, the missile has been triggered to fire, and he is told to look for the scientists who can stop the bomb.

Owl then plants charges on gun posts and rigs them to explode just as Raptor then arrives to pick him up.

Owl receives a call while returning, which he is informed by Tracy to extract all of Thesis' data.

Owl tries to prove his innocence, which was partly supported by the terrorists' action which the communications were disrupted.

Banner also recalls his late soldiers whose bravery he will not forget, and senses pride he has with the CTSF.