Since the Covid19 pandemic there has been a rise in the use of digital platforms such as online-game based learning platforms (OGBLPs) to diversify the learning experiences of students. This paper investigates the implementation, challenges, and benefits of online game-based learning platforms for English learning of students with English as a second language (ESL) in Sweden’s upper secondary schools. We aimed to explore teachers’ experiences of students’ vocabulary acquisition and whether it is facilitated by employing OGBLPs. We also examined the benefits and challenges of using OGBLPs for vocabulary acquisition. For this purpose we employed a qualitative approach where five upper secondary school English teachers were interviewed. All data was later transcribed, where responses from the interviews were used to highlight how teachers used OGBLPs, and what they considered challenges and benefits. Overall, teachers reported positive attitudes towards the use of OGBLPs as it influences elements such as student engagement and leads to increased motivation. However, all participants of this study also claim that OGBLPs ought to be used in combination with a theme or presentation connected to curriculum content as they doubt the effectiveness of OGBLPs in vocabulary acquisition when used in isolation, as a single learning activity.