Intrusion 2 is a side-scrolling indie action platformer game published and developed by VAP Games. The game is very much in the style of old side-scrolling classics like Gunstar Heroes and Contra, and it is every bit as good as the aforementioned games. As chance would have it, Gunstar Heroes is already a part of the OnLive PlayPack, so you can compare the games for yourself. The sole developer of the game, Aleksey Abramenko, worked on it for three years, spending upwards of five months on the final boss alone. The effort shows as this is one of the best side-scrolling shooters of all time, and the final boss is one of the greatest boss encounters of all time.
The game is set in a sci-fi environment on a reserve planet occupied by a hostile military corporation conducting forbidden weapons research. Intrusion 2 is inspired by classic 16bit era side-scrollers and focuses on classic fast paced action combined with modern physics and animation.
You can play the free demo of Intrusion 2 for the US, the UK and Belgium powered by OnLive.