i-War 1 & 2 are reduced on gog.com at the moment for less than £8. Great value if you can put up with the dated graphics.
If you are feeling particularly poor or only possess a dated machine there are also opensource projects around Freespace 2 and Elite – Frontier. I can’t say how good they are…
Everspace is probably the closest to thing to Freelancer at the moment – crazy fast paced dog-fights etc.
If you liked the original Descent have a look at Sublevel Zero. Another one you can play for a quick 20 minute fix before going back to whatever you should really be doing 🙂
[video]https://youtu.be/wx9qBBUPdBo[/video]