The original Alien Front is an arcade game developed by Sega, which was then ported to the Dreamcast in 2001, adding online multiplayer. In 2004 Sega announced another port of the game for the ill-fated Nokia N-Gage, as we can read on IGN:
“In Alien Front, you can take on the role of an army tank commander to defend the Earth against invading aliens, or switch sides and take command of a futuristic 2-leg walker, a 4-leg spider walker, or an anti-gravity hovercraft vehicle. Alien Front also has a two-player deathmatch mode via Bluetooth wireless technology and the possibility to share game statistics with the world via the N-Gage Arena.”
As many other games planned for this phone-console hybrid, Alien Front was later cancelled. In 2019 a playable prototype was found and released online.