Info

This game is an unfinished prototype and available only for FREE. It has some graphics bugs and Engrrrish. Its source code was lost and it's no longer possible to correct anything in the game. It's now available on Steam as a free bonus for The Last Dogma owners.
There's no customer support for this prototype and it's available as it is.

The most definitive (and certainly finished) version of this game is called Sacred Line Genesis. It has new characters, plot details and also extends the ending. The only little problem is that it's only available for Sega Genesis / Mega Drive and it's a graphic adventure. More information here:

About the Game

Sacred Line is a free first person dark adventure/surreal thriller which features story-driven physics-based exploration gameplay, black-white-red BD style and abstract plot free of cliches.

It takes place in a world where your main enemy is a union of third-world countries, which is trying to set totalitarian regime over the whole planet. In this game you will face their immortal leader and his loyal four-handed servant which were summoned by the ancient sect.
This game has two endings, normal and secret (Cat Ending).

You are playing Ellen, a private detective, who is trying to survive in Eastern Europe. Lately detective business, which she inherited from her missing sister Sarah, almost ceased its existence and one day, before she was going to close her office, she got an anonymous call. The unknown asked her to find a hidden forest outpost and told her about its position. That was just the beginning.

You can access the game via "steamapps/common/The Last Dogma" folder on your hard drive. Simply launch "Sacred_Line.exe" executable file.

Controls:
W, A, S, D - Move
Space - Jump
Left Shift - Sprint
Left Mouse Button - Drag Objects / Read Notes (press again to close)
Flashlight - On/Off
Tab - Close message
Escape - Game Menu / Skip Cut-scene

Physics Note
Almost every object in the game is physically interactive. You can drag'n'drop things using Left Mouse Button, glass and walls are breakable.
For example, you can break the glass by nearby chair using your mouse (and you shouldn't forget about it).

Region-locked
The game is region-locked and won't launch if you live in CIS countries, South Africa and United Arab Emirates. The lock was supposed to be removed in the 1.4 update, but then the source code got lost. Which makes 1.3b the final and the only available version to this day.