Haaf's Game Engine(HGE for short) is a Open Source 2D Game Engine and is published under the The zlib/libpng license and is free to use even in commercial applications, however it makes use of the BASS audio library for sound, which is free for non-commercial use, but for commercial use you will need to purchase BASS or use a different audio library(BASS can be simply disabled).
An interesting looking game, though judging from the youtube video the sound and graphics aren't that great, but gameplay looks fun.
Description taken from site:
Zirconia 2: Battle is a unique 2D "space" shooter not set entirely in space. In this game, you and a computer-controlled opponent are playing vertical scrolling shooters, split-screen style. You must defeat 7 different opponents indirectly by using cards that you will draw throughout the course of the match. These cards will have various effects, such as spawning enemies on your opponent's side, or by sending projectiles over.
Features
* 8 playable vehicles to select from, many of which are non-traditional
* Each vehicle has unique shot patterns and starting stats
* Choose from over 10 pre-built decks that have different playstyles
* Earn upgrade points and distribute them as you choose
* Mouse control is supported, and keyboard configurations are customizable
* Lots of replayability: Try out strange vehicle/deck combinations!
* Over 30 rounds in all, comprised of 7 different opponents
* Automatic saving: Just select a save slot when you start and never worry about forgetting to save. There are 10 save slots in all, so multiple users can all play.
Author: Z2 Games
E-Mail: Unknown
Download:
Z2games.com
Website:
Z2games.com
Updated/Released:
19 Nov, 2005