So 'Half-Life series' will only be focused on Half-Life 2?

No. We just cba to add HL1 support yet since these leaderboards aren't even functioning properly yet.

Once these leaderboards have all the features needed for HL2 leaderboards to work, HL1 will be supported as well.

any progress?

Yes, preparations will be finished this week.

hype!

Ready!

hype!