Hello, im Tim and I'm working on my own "Laser"-Tag-Game for Arduino. I'm searching for a strong Infrarot-LED, which can be receives at 15-20 Meters too. Thank you very much.
PS: Sorry for my bad english, I'm from Germany! 
TSAL6100 IR led
TSOP receiver from Vishay
With a 50mm lens setup you can easily achieve the 100 meter range
Cheers,
Jack