When others take too much space, we often find it annoying. In the space occupation games, it's the opposite! You'll have to take the most space you can to annoy your opponent.
Often, you need to grow bubbles or characters while avoiding contact with your opponents. You must be very fast and have good reflexes while developing a small strategy.
In Hungry Sumo, you must magnify sumos as possible while in Big Bubble Pro, it is colored bubbles.