I don't know what's your main priority on the game. But I think it should be a MMORPG !
- Log - In / Register ~ Maybe make a Log - In and Register Icon in the start of the game.
- Character Customization ~ How about making your own character ? I think it would be useful if MMORPG.
- MMORPG Mode ~ Make your own character, pick what corps you want. At your first start you will start as trainee. You must get a high score at training, maybe putting a large dummy at the training ground size should be like a titan's size. If you finished training you would able to pick what corps you will join.
- Survey Corps Expeditions ~ Maybe starting at expedition 1 ? Give an schedule when will be the expedition. All of the Survey Corps will go and join at the expedition.
- Stationary Guard ~ As a stationary guard your main priority is to protect and maintain order near the walls. Use the cannon and rifle as weapon, they will protect the wall at any cost.
- Military Police Brigade ~ The Military Police Brigade is the primary police force within human territory. Not only do they maintain order, they serve as the king's guard. Since they do not normally come in contact with Titans, they must have special permission to use 3D gear and usually carry firearms such as rifles instead.
- Unlimited Titan Mode ~ No Time Limit, No Death Limit and Unlimited Titan. Fight as long as you can, if the player press 'Esc' they will have option. Save Score and Quit and Quit without Saving Score.