You can find plenty of independent authors making variations in a few places
or use a crowd sourced alternatives site
My favorite game is The Dark Mod (free fp game for Win, Mac and Linux)
Free download from official page
~3Gb, 1 training mission and 2 real missions.
More than other 100 missions can be downloaded and added in the same game menu.
Include also a wysiswyg game editor when you wish to creat own missions.
A little helper
MBR IP track: the numbers say
_"Welcome back again where it all began
Open are the ports. Services all started.
Knock at every door and grab the missing strings
Put them in a row and crack the code to win
Scanning close the files may reveal some things
Data you can't hear. Data you can't see.
Scattered are the clues all around the disk
Some are in plain sight some you need to think
Check your mail for messages, log on IRC
Feeling old already? Oh I bet you did.
You will need some tools, look around for hacks
Talk with all the daemons hiding in the dark
Now don't be afraid. It's a simple game.
All you need are memories buried in your brain
For it's in the past where you need to start
Surfing like a pirate. I wish you good luck."_
Yeah so do I, but to stay looged in means I have to keep open a browser that eats most of my RAM, compared to a very fast client that eats between 35-50MB.
As I moderate a few discord, the extra features are most welcome.
Yes it is alpha, but mainly that relates to the Slack support. Discord support could be considered Beta quality. It is stable and very functional.