贪玩狗工作室 (Playful Dog Studio) is the developer and publisher named on Steam for Extreme Racing Line. Its website describes a small indie team and lists two other games, the released idle game Mining & Achievements and Shadowed Journey, a dark-fantasy pixel action RPG in development. Team size and location are not stated.
A minimalist top-down arcade racer on single-screen tracks, where you stay alive until the whole car leaves the road, with leaderboard replays as ghost cars.