Well, if you want a good and cheap Fps for a pc or laptop, play:
1) Firearms 3.0 (Half Life 1 mod):
Weapons:
* KBar
* Colt Anaconda w/scope
* Colt 1911
* Beretta 93R
* Beretta 92F
* Desert Eagle
* HK G3A3
* AK-47 w/bayonet
* AK-74 w/gp
* M16 w/M203
* FA-MAS
* M14 w/scope
* M4 w/silencer
* G36E w/scope
* Bizon
* UZI w/silencer
* MP5 w/silencer
* Sterling
* Saiga 12K
* Remington M870
* M67 Frag Grenade
* Concussion Grenade
* M79
* Claymore Mine
* M60 w/bipod
* PKM w/bipod
* M249 w/bipod
* SSG3000
* M82 w/bipod
* Dragunov SVD
http://media.moddb.com/images/downlo...911/fa_big.jpg
Quite realistic for a Half Life multiplayer mod (with bots)
2) Paranoia (Half Life 1 mod):
Nice, russian guns (Ak-74, Vintorez, etc) and an Stalker atmosphere (and plus, the ballistic helmet and gas mask).