Compared to an outdoor paintball field, the indoor paintball field is a plain field and smaller to an outdoor paintball field. Indoor fields don't have trees or grass to cover you but manufactured objects. Most of the professional indoor paintball fields now use inflatable objects. It's strong enough to handle the blow but light enough to transfer the equipment from one field to the next.
There are also indoor paintball fields that mimic an actual situation. For example, a building could be changed into a paintball field. It's just like a game of cops and robbers only you're doing it with a paintball gun.
When playing in the indoor field, expect that the game will be very fast and very loud. Since you are in a covered environment, you'll practically hear every sound of the paintball gun at a maximum level. The good thing about this is that you'll hear where your opponents are but at the same time, they can also hear you whenever you fire your paintball gun. Indoor paintball field is a very challenging course that your tactics in a paintball game is changed to a rushing feel of adrenaline.
You look out for opponents all the time since they'll just be waiting in an unexpected area all the time. The rush is actually one of the reasons why indoor paintball field is popular among players.
When in the indoor paintball field, it's almost impractical to have a sniper. Sniper paintball guns will heat up real fast and will not fire rapidly. What you need in an indoor paintball field is a paintball gun that fires rapidly and consistently. Power is not a problem in this field. Since they are usually small, you can hit your opponent at your intended target in most paintball guns. Be sure to have a paintball gun that can withstand continuous firing.