yeah pretty much every gun has an airsoft version, even like a flintlock pistol or the pp-19 bizon..
You can play whatever you want, every field has it's own unique games, we played some sort of capture the flag, king of the hill and search and destroy.
most of the guns have a range of 100 to 180 feet, with an average feet per second of 350 for most aeg rifles and around 300 fps for gas blow back pistols, so it definitely hurts more than paintball on unprotected skin, it can draw blood.
Most people use red dot sights because a magnifying scope isn't really necessary, but for a dmr (like my m14 ebr) or a sniper rifle it definitely helps out and just looks badass haha.
For me, it's sooo much more fun than paintball, because it feels more realistic and looks more realistic, it's also a gentlemen's game, which brings a certain type of gameplay. when you're hit, you have to call your hit, and most people do that.