If you want a nostalgic way to play Half-Life (not Source games) on Android, look for Xash3D Android instead – that’s the real project behind these “Source Engine” mislabeled APKs. For actual Source Engine games (HL2, Portal), you’ll need NVIDIA Shield’s official ports or streaming.
First, let’s address the elephant in the room. Source Engine 1.15 Apk
The srceng-mod team has been attempting to backport Source Engine 2013 to SDL2 (Simple DirectMedia Layer) for Android. If successful, we might see a real APK in late 2025 or 2026. Until then, treat any "1.15" download as a modding ship that sailed in 2014. If you want a nostalgic way to play
Valve has quietly released on Android via Dota Underlords and Artifact . However, this version is heavily stripped down for mobile strategy games, not first-person shooters. There is no public SDK to port Half-Life 2 to it yet. The srceng-mod team has been attempting to backport