I pick it up again every once in a while. I just had a slate of particularly miserable emeritus short losses, including one where 9 of the 13 Klingons left were in one sector. I was docked in a Starbase adjacent to that sector, and I could have sent an armed probe. Instead, to not get any more planet loss points, I decided, “I’m just gonna take em with phasers.” I got killed immediately.
That’s the one I prefer - the game’s public domain and has many variants. It was a fan game originally written in BASIC for the PDP-11, I believe, and has been ported many times.