In the most unbalanced filed, combat starts everywhere. All cells have to observe and obey the jungle law: bigger cells prey upon smaller ones, big cells eat little cells. The law of the fang is never repealed, yet we have evolved to different strategies:
1) Feed, eject a small cell to attract your targets, or help your mates grow up;
2) Split, split into two same half cells, homed in on your target.
You can play offline with computer AIs, or online with players world wide. Name you differently or you may be the target easily. Find your mates or you will lose it soon.