Tournament (Tourny, Speedball, etc)
Played between 2 teams on a field with bunkers (inflateables) at high speed to normally try to either take out all of the enemy and or catch a flag.
Woodsball
Again normally played between 2 teams, but this time in the woods. Woodsball is slower than Tournament but is where most of us started.
Scenario.....
Scenario is pretty much as it says on the tin. It is all based around a certain scenario, for example D-Day or the pacific fight in the second world war up to non historical ideas such as Staargate (the extra a is intentional) or Time Wars. These last 2 ar thought with many different sides, and can be a lot more competative.
If you have any more questions then please ask. And remember "the only daft question is the one thats not asked"