Plants vs. Zombies: Future Wars

This game is set in the future, obviously.

Info
"First of all, that was no darn riddle. " -Zomboss, in game

This game takes place in beta-carrotina's base, in the future, where one person(The player), has to defend the place from zombies(duh). The tutorial is based in a drill, consisting of holographic zombies coming towards the base entrance.

Units
Plants are replaced by units in this game, which are robots that act like plants. Metal replaces sun in that matter, which is obtained over time.

They're boosted by power cells, which replaces plant food, but functions just the same.

There are three upgrade paths, or triads, that each unit has, enhancing HP, damage/fire rate, and their attack(Burst fire, and EMP duration for example), each one costs metal.

Some units require maintenance to continue defending, which costs more metal. Sometimes, it isn't worth it though...

The units are as follows:
 * Sentry gun(Replaces peashooter)
 * Mecha-flower(Replaces sunflower and potato mine, for obvious reasons)
 * (Add unit here)

Zombies
There are an unusually large amount of zombies in this game. It ranges from basic zombies, up to zomboss!

Worlds
There aren't any worlds yet, But I'll make some.

story
I'll come up with this later.

Trivia

 * This game has an unusually low amount of units, compared to PvZ1.
 * This is the only game where an allied character isn't Dave, or any other non-plant character.
 * The player him or herself can customize their character before beginning the game for the first time.
 * There is a hidden unit that references PvZB, being a ghost pea. This one is the only one to not be a robot, and also the only one to not have upgrades. He still costs metal, and is a literal hologram in this game. This one wasn't added to the list yet.