Half Life 2D

Half Life 2D is a Action-adventure game. All history was taken from oryginal version of game "Half life" (1998). All developers are fans of all Valve games.
Oryginal game: Valvesoftware.com

This version have only a bit of changes, like:
-easter eggs
-new boss
-new functions
-only few monsters
-only few weapons
-short game
-logical cases

Yeyhay Platform engine is go with Half Life 2D very good and graphics is more qualiter than "Stefan The villager 2".
About Yeyhay:
"Yeyhay Platform engine - engine for platform games and action adventure games. It based on Multimedia Fusion and C++.
The engine was relased in 2008 November by Polish developers: Szymon Matuszewski & Daniel Matuszewski " Thats a source from here