CSPortable, which stands for Counter Strike Portable, is a Conter Strike fangame based upon a ported Quake 1 engine.

Changes:

Bullet Spread
Serverlist
Skybox (Added from Kurok0.4)
Clean Menus
Rescue Zones on CS maps
Buy Zones on all Maps
Bomb Zones on DE maps
Grenade Fix
Throw Weapons Fix (need some models)
Fixed bug that allowed Terrorists to buy Counter-Terrorist Weapons
Fixed bug that allowed Counter-Terrorists to buy Terrorist Weapons
Fixed bug that allowed to plant the bomb everywhere
Transparent Texture Support
Some Menus Fixed
3rd Person Weapon
Grenade Fix
Mp5 Faster
Mac10 Fixed

Maps:
cs_assault
cs_italy
de_aztec
de_dust2
de_dust
fy_poolday

http://forums.qj.net/psp-development-forum/155781-csportable-0-8b2-source-code.html