Overlord

Overlord is a 2.5D game developed by AmCoG games.

It is a shoot-em-up game in the style of Gyruss/Tempest.

It was written on a Raspberry Pi 1 over a period of 10 months and is compatible with the Raspberry Pi 1, 2, Beagleboard, Pandaboard, Iyonix, Virtual Acorn SA (running 4.02), RPCEmu and ARM X6.

http://www.amcog-games.co.uk/overlord.htm