Hi! I'm currently developing a two player 2d shooting game based on SDL. I just wonder with type of input system i should use, with type supports the highes number of button presses simultaneously? //Tobias

Simultaneous keyboard presses are limited by hardware, typically to about 3 normal keys plus any combination of Shift/Alt/Ctrl. On top of that you can get as many mouse buttons as you want plus mouse movement. Normal use of SDL's input methods is fine for all that.