Entropy: Zero will work in Garry's Mod. store.steampowered.com/app/71407… docs.google.com/document/d/1vH5u…
Portal kind of works in Garry's Mod. Addons are available to make it work, but portals don't really work in Garry's Mod in general. store.steampowered.com/app/400/P… docs.google.com/document/d/1fJYy…
Portal 2 will not work in Garry's Mod. store.steampowered.com/app/620/P… docs.google.com/document/d/1atpq… To be honest, there was a lot of stuff that I had no idea what was going on. I apologize for the lack of clarity and the absolute length of this document. 😐
Estranged Act 1 kind of works in Garry's Mod store.steampowered.com/app/26182… docs.google.com/document/d/1oM1c…
Half-Life 2: Episode 1 kind of works in Garry's Mod. If the models are replaced, it will work. 👍 store.steampowered.com/app/380/H… docs.google.com/document/d/1JDJq…
RunThinkShootLive: Sniperville will work in Garry's Mod. runthinkshootlive.com/posts/snip… docs.google.com/document/d/1WGB0…
Black Mesa kind of works in Garry's Mod. Human NPCs can be replaced with default NPCs. Everything else may or may not be fixed with addons. store.steampowered.com/app/36289… docs.google.com/document/d/1SD2c…
Half-Life 2: Episode 2 kind of works in Garry's Mod. If the models are replaced with the appropriate ones, then it will work. 👍 store.steampowered.com/app/420/H… docs.google.com/document/d/1dm80…
The Stanley Parable Demo will not work in Garry's Mod store.steampowered.com/app/22191… docs.google.com/document/d/1Ghib…
Half-Life 2: Lost Coast will work in Garry's Mod. store.steampowered.com/app/340/H… docs.google.com/document/d/1zj62…