Dogfight2H is a classic 2D STG, but notably features a space called "hyperbolic space" where the game goes on. Fly your fighter plane and shoot down enemies in the space negatively curved, defined by non-Euclidean geometry, and you will experience an extraordinary sensation.
Play it on tablets or phablets with 5-inch or larger screens. Your whole device is the gamepad with which you control your own fighter plane. Tilt the device forward/backward to accelerate/decelerate and left/right to turn. Touching the left/right side of the screen fires a machine gun/missile launcher.
1. Player A & B - Tap "Enable Bluetooth" button if it is present.
2. Player A - Tap "Server" button to make Player A's device discoverable.
3. Player B - Tap "Client" button and select the Player A's device.
4. Player A & B - Tap "Fight!" button to start a gameplay.
Another genre of non-Euclidean game seems to be available.
If you are interested in hyperbolic geometry further, please refer to the following contents.