To get to the big boss you'll have to go through his henchmen. If you manage to hide a body, make a headshot or get combo kills, you'll earn bonus points. Be careful not to alert your targets!
Stealth Sniper is the right game for you to play on Gamerock.me.
If you want to play more games, check out OMG: Operation Machine Gun or Bot Camp New Enemies.
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Shooting,3D Shooting,Sniper,Unity3D or just check out the best games page.