TL;DR
- mousesports terminated coach Rejin after ESIC investigation revealed extensive CSGO spectator bug exploitation
- The coaching exploit allowed unauthorized map control and enemy intelligence gathering during competitive matches
- Despite no violations with mousesports, Rejin received 19-month ban for previous Tricked Esports exploits
- Team faces coaching shortage crisis, relying on players karrigan and ropz for tactical leadership
- Recent ESL Pro League performance indicates potential top-10 ranking recovery despite scandal

Professional esports organization mousesports made the difficult decision to terminate head coach Allan “Rejin” Petersen following his admission of exploiting Counter-Strike: Global Offensive’s spectator system vulnerabilities. This incident represents one of the most significant competitive integrity breaches in recent CSGO history.
The Esports Integrity Coalition’s comprehensive investigation identified 37 coaches who manipulated a critical flaw in CSGO’s spectator code architecture. This security vulnerability provided unauthorized access to comprehensive battlefield intelligence, including real-time enemy positioning, equipment loadouts, and strategic utility deployment across all map locations.
While ESIC’s initial sanctions appeared measured, tournament organizers like ESL implemented substantially more severe competitive bans. These ranged from several months to multiple years, effectively sidelining offending coaches from major competitive circuits.
After the investigation of @ESIC_Official concluded, we decided to permanently part ways with our coach @RejinCS. We thank Allan for his services, and while we’re extremely sad to see him leave the team, our firm stand for competitive integrity left us with no other option. https://t.co/CtVsYHIEh3
— mousesports (@mousesports) October 6, 2020
Rejin’s Tricked Exploits: Competitive Integrity Breaches
Investigators determined Rejin’s exploitation occurred predominantly during his tenure with Tricked Esports, where he repeatedly manipulated the spectator bug to gain unfair tactical advantages. His systematic abuse of the vulnerability resulted in a substantial 19-month competitive ban, though this penalty was reduced due to his cooperation during ESIC’s confession grace period.

mousesports’ official statement emphasized that while no evidence surfaced of exploit usage during Rejin’s time with their organization, their uncompromising commitment to competitive ethics necessitated his dismissal. This decision highlights the challenging balance between individual talent and organizational integrity standards.
- Teams continue facing difficult decisions regarding banned coaching staff despite competitive disadvantages
Despite demonstrating significant performance improvements following CSGO’s summer competitive break, mousesports formally announced Rejin’s termination on October 6th, strategically timing the decision before their DreamHack Open Fall 2020 tournament matches. The organization now confronts a severely limited coaching candidate pool, forcing reliance on in-game leader Finn “karrigan” Andersen and star performer Robin “ropz” Kool to assume additional strategic responsibilities.

This coaching crisis creates immediate tactical preparation challenges, particularly for analyzing opponent strategies and developing counter-tactics between matches. Teams facing similar situations should consider developing internal leadership pipelines and cross-training analytical staff to mitigate dependency on single coaching figures.
Fortunately for mousesports, their strong ESL Pro League Season 12 performances provide encouraging indicators for future competitive success. With closely contested matches against elite CSGO squads, the team demonstrates clear potential to reenter the global top-10 rankings for the first time since June, despite the coaching disruption.


The broader esports industry must address systemic vulnerabilities in competitive integrity systems. Organizations should implement regular code audits, establish clearer ethical guidelines, and develop contingency plans for coaching staff transitions to maintain competitive stability during crisis situations.
Action Checklist
- Regularly audit spectator system code for potential exploitation vulnerabilities
- Establish clear ethical guidelines and regular training for coaching staff
- Develop contingency plans for coaching staff transitions during integrity crises
- Cross-train players and analysts to assume tactical responsibilities during coaching vacancies
No reproduction without permission:Game Guides Online » mousesports releases Rejin after admission to CSGO cheating How mousesports' coaching scandal exposed CSGO's competitive integrity crisis and team consequences
