Is anyone still interested in this project? This thread inspired me to start my own hl2 “backwards” mod last june which I wanted to be playable by casuals and speed gamers. My goal was to make it feel just like regular hl2, but with the maps being played in reversed order of course, so triggers, NPCs, scripted sequences, player spawn positions, elevators, teleports and lots of other things are edited. I have also edited brush work, or used props and ladders in parts where it’d be hard or impossible to progress otherwise without speed gamer strats. About 2/3 of the maps are playable, although non are even close to being final, and will require lots of work still.
Below is a demo of still unfinished maps if you want to see what it will roughly look like. I haven’t bothered with optimization yet so I suggest opening portals with “r_portalsopenall 1” command.
Let me know what you think and if you want to help.