CS2-10k: A Large-Scale Egocentric Counter-Strike 2 Dataset

CS2-10k is a large-scale egocentric gameplay dataset built from professional CS2 matches. It contains 600,000+ player-round videos spanning 10,000+ hours of first-person footage, paired with per-frame annotations covering keyboard state, mouse movement, and 3D player trajectory.

CS2-10k is built from public professional match demos sourced from HLTV. For each demo, we render first-person video at 720p, 48 fps using the demo replay tool inside CS2, producing one video per player per round. Alongside each video, we store a .parquet file containing per-frame annotations synchronized to the video timeline.

The dataset is published in WebDataset format: ~2 GB tar shards under data/<map>/, where each sample is a <uuid>.mp4 video paired with its <uuid>.parquet annotations. A top-level index.parquet lists every clip with its shard location for lookup and filtering.

Annotation schema

Every video clip has its corresponding annotations stored in a .parquet file:

Field	Type	Description
map	string	Map name (e.g. "mirage", "dust2")
round_number	int	Round within the match
team	int	0 = Terrorist, 1 = Counter-Terrorist
num_frames	int	Total frames in the clip
fps	float	Video frame rate (48.0)
total_time	float	Clip duration in seconds
fov	float	Camera field of view (90.0°)
frame_data	list[dict]	Per-frame annotation array (see below)

Per-frame annotations

Each entry in frame_data contains:

Field	Description
actions	Concatenated active keys: W/A/S/D (movement), J (jump), C (crouch), R (walk), V (freefall), [ (fire), ] (scope/secondary), - (no input)
mouse_x_delta	Horizontal camera delta — proxy for mouse X movement
mouse_y_delta	Vertical camera delta — proxy for mouse Y movement
position_x / y / z	Player world position in game units
rotation_yaw	Camera yaw angle (−180° to 180°)
rotation_pitch	Camera pitch angle (−90° to 90°)

License

Released under CC BY-NC 4.0 (attribution, non-commercial). The underlying match demos are the property of their respective rights holders; this dataset is provided for research purposes.

Citation

@misc{cs2-10k,
  title  = {CS2-10k: A Large-Scale Egocentric Counter-Strike 2 Dataset},
  author = {Reka AI},
  year   = {2026},
  url    = {https://huggingface.co/datasets/RekaAI/CS2-10k}
}