Have you ever played Operation Flashpoint?
There's a funny form of control, you can aim with your weapon at the hole Display and it does something like side-scroling.
But now
Devenger remade the CS:S Weapons:
Twitch Weaponary
They use this Way of aiming in an really cool way!
Download
http://www.garrysmod.org/img/?t=dll&id=70961
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