Standalone bundles as alternative download, not just individual extension .dll per game
A standalone bundle would be the only sane solution to not using the agent (should someone want to cause themselves more work) and avoid support issues due to the many dependencies each game generally has.
Games such as Unturned require DLLs outside of what we develop to work, which can be found under the src/Dependencies/Base directory for each game if they do have any. These additional dependencies along with the game's extension, core, engine DLL, and most likely the patcher should all be bundled together in a single .zip file that is updated as each component is updated.
We would still be recommending and pushing the usage of the agent though, as that causes the least amount of work for both users and us, and the whole process and transfer methods used.