What We Know

The game is prone to lag on emulation (Also likely official hardware) so you will want the 64 bit version of PCSX2 (Beta as of the time of writing) and a decent PC for emu-runners.
Body shots are basically worthless in this game so either use the auto-rifle's grenade or go for a headshot.
Conserving grenades is an essential skill for groups of enemies or ones you aren't confident you can headshot. 

In level 1, use a grenade on the doctor, she won't die and then you can run to the top without her.
In level 2, use a grenade on the guy with a pistol (The one who completes the mission) as it is faster.
In level 3, you get a lot of grenades so use them against enemies behind cover and at the base when turning a corner. (There are also 2 guys standing by a...bridge [I think] who can be sniped with the grenade)
In level 4, shoot a grenade at groups especially when first entering the mine (You should only need to use 2 to get downstairs) and notes that the shotgun, whilst powerful, has a slow fire rate making it bad for groups of enemies.
In level 5, you need to keep 1 grenade for the final boss but otherwise it is your choice on who needs to be hit with a grenade.

As it stands, there ARE glitches but none of them have been useful in a run.

Gamesfan34260

Stealth Force: The War On Terror

Mission 01 - The Doctor

Mission 02 - Arms Dealer

Mission 03 - Airstrike

Mission 04 - The Mine

Mission 05 - Leader's End

PlayStation 2

Akuretaki

EUR / PAL

Console

Emulator

System

backwards-compatible PlayStation 3

SRGTsilent

AGDeveloper