Lookie what On The Rocks Games got here:

Diablo fan boys squeeeal!!! Maybe some StarCraft fans squeeal as well! Breathe, breathe… there you go!

A pack of cultists built a giant mecha to summon Amon into it to control him and his Legion.

Something went horribly wrong and you now have to battle through the cultists and Amon’s Legion.
to get to him.

Legion is an action packed RPG with vast variety of weapons, enemies, traps, collectable items, settings
and a great story which will keep you playing until the end.

Legion of Amon was the previously work titled Project Mecha.

We like the new name OTR!

Samples:

More here.