Parabellum

Controls -
Fire : LeftMouseButton, Gamepad_RightTrigger
Targeting : RightMouseButton, Gamepad_LeftTrigger
Reload : R, Gamepad_FaceButton_Left
InGameMainu : Escape, Global_Menu, Global_Pause
Primary : 1, Gamepad_DPad_Up
Secondary : 2, Gamepad_DPad_Down
Movement : W, A, S, D, Gamepad_LeftX, Gamepad_LeftY
Looking : Left, Right, Up, Down, MouseY, MouseX, Gamepad_RightX, Gamepad_RightY

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there are 5 wave 
1st wave, 3 enemy difficulty total 30 enemy
2nd wave, 5 enemy difficulty total 30 enemy
3rd wave, 6 enemy difficulty total 25 enemy
4th wave, 7 enemy difficulty total 20 enemy
5th wave, 8 enemy difficulty total 20 enemy

on completing wave 60 bullet rifle ammo awarded
pistol has infinite ammo
you can hide to regenerate health