Possible features

So I told I would post a list of the game's possible features, huh? So here it is:
- Made entirely with C++;
- 2D shoot 'n' gun game;
- Co-op 4 players (or players with bots);
- Save your downed teammates before their deaths;
- If a human dies he'll become a zombie;
- Medicine kit and adrenaline injections are kinda rare in the scenaries (use them with caution);
- 3 difficult setting, the classics: easy, normal and hard;
- Some special zombies (there will be a post talking more about them);
- Some firearms and melee weapons.