IMO, Chetan, Marc and Akash were never playing a game
per se. They were a group and good buddies. Now that Marc is gone, Akash and Chetan are being good buddies. Mona always tried hard to squeeze into their group but it never worked. They have never shown these three plotting or planning to get someone out. Neither have they shown Aman or Jay doing so. But we've seen Anaida and Mona cooking some scheme or the other. Like when Anaida went for the MJC with Marc, she and Mona were discussing Akash's temper and Mona suggested they use it to their advantage. Anaida responded 'If I come back, he's screwed'. Even today Mona,Anaida and Kash were sitting there discussing how they can weaken the boys. They had also planned to bring Jay into their fold but it never worked coz Jay had a fight with Anaida.
If Akash was clever and had a plan he'd not be ranting and raving like this. He's a fool. Chetan is not as seedha-saadha as he looks. He was the one who understood Mona & Anaida's plan to rile Akash up and he told Akash that he was playing into their hands.