[Tripper]

I've done indoor and outdoor, outdoor is so much better, IMO - I remember on the indoor one, it was in this big warehouse with barrels and shit, the cover only went about a metre high so you spent the whole time crouched and/or crawling on the cold, slippery concrete.
It was fucking funny though cause all my buddies were too scared to run out to the center and capture the flag, so we all just camped at each end of the warehouse taking pop shots over the top of the barrels until we worked up the nerve to rush the other team, half of my team slipped over in the paint before they even got near to the centre.

Outdoor was soooo much better - A huge forest with a hill right in the middle that had a shack ontop and lead to an open field - Way more of a chance to use some interesting techniques and strategies in confusing the team that held the shack.