Suddenly, two louder roars were heard, and two zombies rushed downstairs at an extremely fast speed, and then ran towards the wall.

These are two speed-mutated zombies, and they rushed directly to the roof.

But what greeted them were several lasers, which made them unable to avoid them on the wall. They were directly pierced through the head and fell to the ground.

Lu Feng looked at the scene coldly, but what surprised him was that a ball of light actually floated out from one of the speed zombies.

This is another explosion.

Lu Feng put on the mecha weapon, and auxiliary functions appeared in his field of vision. In a short time, he locked onto three particularly fat zombies.

This is an obese mutant zombie.

However, as three lasers were fired, the three mutated fat zombies also died under the mecha weapons, and then another white light floated up.

A fat zombie also dropped something.

At this time, it was almost over. The Red Leaf Base was already crowded with zombies. If it continued like this, other zombies would not be able to squeeze in.

Those gas tanks were also completely covered by zombies.

So, Lu Feng raised his hand, and a laser shot out from the arm of the mecha. The laser hit a gas tank, and instantly, an explosion sounded.

The zombies next to him were like rotten tofu, their bodies broken in an instant by the impact, and blood flew all over the sky.

Following this explosion, explosions like firecrackers broke out one after another, and balls of fire produced by the explosion of gas tanks appeared madly in the Red Leaf Base.

At the same time, a series of prompts appeared in Lu Feng's mind:

[Congratulations! You killed a zombie and gained 5 experience points! ]

[Congratulations! You killed a zombie and gained 10 experience points!]

…

[Congratulations! You killed a zombie and gained 200 experience points!]

[Congratulations! You killed a zombie and gained 10 experience points!]

…

【Congratulations on your level up! 】

The moment Lu Feng received this hint, he immediately felt a surge of power emerging in his body, and that cool and wonderful feeling reappeared.

Moreover, he also discovered one thing, that is, the experience of many zombies has actually increased.

Originally, killing a zombie only gave 5 experience points.

Now, killing zombies often gives you 10 experience points.

This reminded him of one thing, that is, the zombies in the game will be upgraded. Although they are all ordinary zombies, the zombies at the beginning of the game are definitely not as powerful as the ordinary zombies in the later stages.

In other words, the strength of these zombies has begun to increase collectively.

This is definitely not a good thing.

[Congratulations! You killed a zombie and gained 5 experience points! ]

[Congratulations! You killed a zombie and gained 10 experience points!]

…

[Congratulations! You killed a mutant zombie and gained 300 experience points!]

…

[Congratulations! You killed a zombie and gained 10 experience points!]

【Congratulations on your level up! 】

That feeling of leveling up appeared again, and it was a very wonderful feeling.

At this time, the Red Leaf Base was almost reduced to ruins due to the explosion of more than 200 gas tanks.

In the ruins were densely packed zombie corpses.

Moreover, when Lu Feng took a look, he found that there were balls of light floating in many places, which were obviously the corpses of mutant zombies. Something was exploding.