~These are categorized but not sorted by importance.~ Some minor attempts at prioritizing them. These all can be discovered by launching the game on Linux and playing a few rounds of multiplayer.
The standard fov mode which highly detests widescreen resolutions. [People have made](https://gamebanana.com/mods/227021) entire modelpacks to [fix viewmodels to look right in widescreen](https://gamebanana.com/mods/232432) within GoldSrc games. **This is silly** and should be replaced by a FOV calculation that is based around a 4:3 horizontal axis projection with padding. You'll find those in custom Quake engines like QuakeSpasm and [FTEQW](https://code.idtech.space/fte/fteqw/src/commit/0eeb410ce074b19cffa70049820df14773d7ec5b/engine/client/view.c#L1259) (cvar: scr_fov_mode 4)
For over 2 decades, people have been sharing maps, mods and addons in a variety of frustrating ways. Install an addon and you're the janitor - cleaning up the base install of Half-Life is so annoying you better just remove the game and re-install it.
Ever since 1999, with the release of [Quake III Arena, people just share glorified .zip files they plop into their game/mod directory](https://www.lvlworld.com/).
The gist: Add support for pak style loading of zip files (also commonly seen in id Tech games with the extension of .pk3 and .pk4 (indicating compressed zips)) within the game directory and people can finally delete a map by issuing a command as simple as:
...and that would take care of it all. The directory structure within the .zip should be as if you could run `unzip` on the file and it'd organize itself inside the game directory.
Choosing zip and recognizing the .pk3 and .pk4 extensions would make it easier for people to package the files for the virtual filesystem. Valve may choose to also use their own .vpk format if it would benefit things like Workshop support.
VGUI has plenty of documented memory leaks which especially affect Team Fortress Classic as well. [The issue tracker on ValveSoftware/halflife has plenty of examples.](https://github.com/ValveSoftware/halflife/issues?q=is%3Aissue+is%3Aopen+leak)
Stop sending WHOLE mapcycle.txt in svc_serverinfo message. It easily overflows the buffer and is **not** used on client side. It's fine to send empty string, so it doesn't break protocol.
## Engine: register hidden and working sys_timescale cvar
No game assumes that this behaviour is accurate. In fact, in certain mods (such as The Specialists, where the role-play map fiskcity comes to mind) it can be used to escape the bank vault when you're trapped within. This is not by design.
Seen in rapidcore.bsp, what the heck? If they're trying to chew through entities, check for .takedamage being DAMAGE_NO first or whatever the Half-Life equivalent is!
## Bug: You can drop empty satchels.
Do this in multiplayer: Take up a Satchel Bag and place them all until you're at 0. Then die - and pick up your ammo canister. You'll receive the Satchel Bag in your inventory, but with 0 ammo.
In the console, all underscores look like whitespace. This makes choosing maps or using the auto-completion system in console rather annoying. The font needs to be closer to MS Sans Serif anyway.
Current Linux build always loads GameUI.so from "../valve/cl_dlls/gameui.so" when the Windows build loads "cl_dlls\GameUI.dll". See, it allows providing replacement for mods in Windows version but not on Linux
People will want to play Half-Life mods. Many of those are only for Win32.
Using Proton after installing the Linux version will create a lower case titled version of the game directory and it results in namespace conflict related bugs. The game might not launch anymore, etc.
Switching between Proton and Native in general is very finnicky and the user has to resort to manually deleting the game directories on their filesystem.
There's mods that tried doing this in the past. There's a need and there's a demand. There's more than just code work involved with this though. Should hook into the Sentences subsystem.
If you [manage to fix up and compile the code](https://github.com/ValveSoftware/halflife/issues/3133) (newer toolchain/buildsystem would be appreciated) under Linux, you'll notice how the mouse input code within cl_dll/in_camera.cpp will need to be updated quite heavily in order for mouse input to work properly.
The 'Use high quality models' options under the multiplayer menu is never checked by default. If you're going to make the HD models the default, then the higher quality body groups for the multiplayer player models should be used as well.
The whole model based approach isn't very good. Nobody enjoys this. At the very least employ a VGUI interface to let users choose the teams before spawning.
With once major websites having been shut down over the years, there is a need for Valve to help in preserving maps and addons by making them discoverable through the addition of a Steam Workshop.
VPK/PK3 archive support within the virtual filesystem would need to be completed first, then the workshop integration would be rather straightforward.
## Quality of Life: Rich Presence
While you can join games, it's not easy to see who is playing actively on a multiplayer game. It'd be very beneficial if we could see which game mode they're playing ([the gameAPI exposes this to the engine](https://github.com/ValveSoftware/halflife/blob/c7240b965743a53a29491dd49320c88eecf6257b/engine/eiface.h#L462)) and which map they're playing on.
Valve has created some high quality artwork for Half-Life's Steam Community thing. Like wallpapers, emotes and stuff - the trading card shenanigans. It should probably be used.
We'd probably please people by adding hot precaching, extending limits and other niceties from engines like Source to aid modders. There's a format called BSP2 that the Quake community uses - I don't like it very much. It'd probably be better to support Quake II's BSP format (which was the basis for Source BSP anyway) and the new extended version that landed in tyrutils-ericw for the Quake II re-release. Why? Because Hull Sizes suck, that's why. Half-Life can only run tracebox code for specific bounding box sizes, which has bitten modders in the ass plenty of times. A bit of a pipe dream, but I kept saying to myself when making FreeHL:
> If only Valve had used Quake II's BSP format.
## Fluff: Gluon: There's supposed to be a sprite that hits the wall!
Some mods like to use them. [They also were used in advertising for the game](https://combineoverwiki.net/images/a/ac/Houndeye_video.png) so it would be appreciated to bring them back.
Half-Life had added a slight roll to the viewmodel from the bob calculation. When Half-Life SDK 2.0 came out this broke as a result changes that were intended for Team Fortress Classic, since the client shared code between the two games at one point.
The logic that needs to be restored is along the lines of:
```
viewmodel.angles[ROLL] += bob
```
Noting that the model tilts to the left, which means you may have to reverse the direction of the applied bob depending on how the engine interprets angles.
Originally, Half-Life supported EAX audio. You can experience it these days with Wine-Staging and its EAX emulation with the original patched CD version.
OpenAL has the EFX extension set, which is compatible with this. This would enable Half-Life to get its original soundscape back.
It'd also be nice that if the player name was "Player" (the default in most games) would be replaced by the Steam user name. Although that might require UTF-8ifying more of the codebase in some parts? I have no insight on this within GoldSrc.
Old mods ship with backgrounds for the original MFC version of the Half-Life menu. Check if a splash.bmp is in the current game dir depth and not one of the VGUI menu based .tga files. The video card requirements on Steam + Half-Life was raised high enough that no GPU that can only load 256px textures into video memory can run the engine anyway. Might as well store a non-power-of-two image like that in as a fallback if no VGUI menu files exist.
One example: Go into a multiplayer match, pick up the .357 Revolver. Then use the Quick-Switch key to switch between the 9mm Handgun and back to the Revolver. You'll be able to see the cut Silenced Glock for a split second. Tthe animation gets swapped before the model gets exchanged and the bodygroup swapped.
## Fluff: Mods Win32 DLL loading
Valve ships Proton. Make it so the native Linux version can load Win32 dlls. It's something we've talked about before and some people have successfully tested - it'd be interesting to pursue but kind of a pipe dream.
