Recently Valve, launched Siltbreaker campaign in Dota 2, Does anyone know how do they count the battle points with the single game?
According to the wiki:
You can earn 200 points for each one star, 400 points for each two star, and a Siltbreaker Reward for three stars.
For defeating the final boss: 1 star: 50 points, 2 stars: 100 points, 3 stars: 150 points.
Then there are achievements that you can complete that will earn you somewhere between 250 and 2000 points each.
Also, people with a battlepass level at least 165 will receive 2 Siltbreaker rewards for the three-star rewards.