<page_title> Frictional Games </page_title> <section_title> Games developed and published </section_title> <table> <cell> 2007 <col_header> Year </col_header> <col_header> Lin </col_header> </cell> <cell> HPL Engine 1 <col_header> Engine </col_header> </cell> <cell> 2008 <col_header> Year </col_header> <col_header> Lin </col_header> </cell> <cell> Penumbra: Requiem <col_header> Year </col_header> <col_header> Lin </col_header> </cell> <cell> Amnesia: The Dark Descent <col_header> Title </col_header> <col_header> Mac </col_header> </cell> <cell> HPL Engine 2 <col_header> Engine </col_header> </cell> <cell> Amnesia: A Machine for Pigs <col_header> Title </col_header> <col_header> Mac </col_header> </cell> <cell> Soma <col_header> Title </col_header> <col_header> Mac </col_header> </cell> <cell> HPL Engine 3 <col_header> Engine </col_header> </cell> </table>
The HPL Engine 1 was expanded until 2008, but that changed when Penumbra: Requiem was released the HPL Engine 2 was used in the Amnesia series and the HPL Engine 3 was used for Soma.