While it's incredibly early days for Allspace, this free to play first-person space combat game could be interesting when it's a little less bare.
You can see some rough gameplay from the developer below:
The developer claims it supports up to 100 players at a time, although with an all-time peak of 12 people I really doubt they've been able to thoroughly test that claim so far.
As a huge fan of space combat games, I'm quite keen to see what the developer does with Allspace. As it stands though, it's not just enough to be free, it has to hook players in somehow and currently it doesn't really do that at all.
Find it on Steam, free with no micro-transactions.