XCOM 2.6 doesn't seem to directly refer to a widely known version of a game or software. However, I can infer that you might be referring to XCOM, a popular turn-based strategy video game series.
: Users can toggle between ASCII and Hexadecimal display modes for both sending and receiving data. xcom v2.6
XCOM is frequently the "bridge" software used during the initial setup of hardware: XCOM 2
The eight-soldier squad allows for true combined arms: two scouts, two medics, two rocketeers, one gunner, and one sniper. The tactical depth explodes because you can now afford to lose a soldier or two and still complete the objective. xcom v2.6