Well over time when you get achievements and kills the kind of just appear randomly. Like I just left my game on for about an hour and a half to go eat at macdonlalds and I came back and on the screen it said that I had unlocked the force of nature. And at one point it had been 2 months and I had only unlocked 1 weapon. But you can unlock the same weapon multiple times. Like at the moment I have 3 direct hits.
Yes it is here.
do the missions
To unlock all weapons in TimeSplitters 2, you need to complete the game on different difficulty levels. Specifically, finishing the Story Mode on Easy, Normal, and Hard will unlock various weapons. Additionally, you can play in Challenge Mode and complete specific challenges to unlock even more weapons. Lastly, some weapons can be unlocked by achieving certain objectives within the multiplayer modes.
You must play Multiplayer and get experience to "Level Up" and after a certain amount of level ups you can unlock new weapons for kits.
You don't do missions to unlock weapons you unlock weapons by leveling up.
Sorry But NO
yes
You need to unlock the weapons.
Not yet.
you have to rank up to earn game modes, weapons, perks, and equipment
Yes, in Eliminate pro you can unlock more special weapons(deadlier weapons/more powerful). You just have to keep on winning also you have to be at high rank to unlock more faster and stronger weapons.
I don't think there is cheats. All I know is that you have to unlock levels to get new weapons.