Dorian Berman entered the world of esports in 2018, starting his career in the CS
discipline. Initially, he competed under the nickname "xertionic," but later changed it to "xertion."
At the beginning of his journey, the esports player represented various mixed teams, participating in numerous online tournaments. However, Dorian struggled to achieve significant success with these early teams. His first notable result came in 2019 when Play2Win secured a 3rd-4th place finish in the ESEA Season 30: Intermediate Division - Europe tournament.
The remainder of his career was marked by further successes. In 2020, xertionic joined the PlanetStrike team, with which he won gold at the WINNERS League - Season 3: Europe Starter Division. Later that summer, he transferred to KPI Gaming, reaching the semifinals of the Liga de Videojuegos Profesional - La Copa 2020 with his new team.
At the beginning of 2021, Dorian Berman joined OompaLoompa and won the ESEA Cash Cup: Europe - Winter 2020 #4. He then signed a contract with mouz NXT, where he won WePlay Academy League Season 1: Online Stage and WePlay Academy League Season 1, and secured 1st-2nd place in WePlay Academy League Season 2: Online Stage.
In September 2022, Berman became a member of the MOUZ main team, where he currently plays as a sniper. With the "mice," he has claimed victories in tournaments such as Thunderpick World Championship 2023: European Series #1, ESL Pro League Season 18, PGL Major Copenhagen 2024: European RMR B, ESL Pro League Season 19, and BetBoom Dacha Belgrade 2024 #1. He has also achieved 2nd place finishes at the CS Asia Championships 2023, Intel Extreme Masters Chengdu 2024, and Intel Extreme Masters Rio 2024.