These are steps on how YOU can play this zombies special bonus round and see the outro for yourself. I'm posting this up for YOU guys so just in case you don't want to watch an entire video on it OR if your more of a narrative learner, you can read it yourself :

CREDIT TO TMARTN:

Step 1: Exo Survival has 4 Tiers. All 4 including 4 multiplayer maps. Each tier except the first one, needs to be unlocked. In order to do that, you must complete 50 rounds in the first tier to unlock the 2nd tier. Now, NOT on a SINGLE map, but in TOTAL.

Example: If you played BIO LAB and made it to round 25, you can get killed or leave then start up another map also reaching round 25. Then you have 50 rounds completed in total, unlocking TIER 2.

The first couple of maps are BIO LAB, RETREAT, DETROIT and ASCEND


Step 2: In TIER 2, you must complete 75 rounds in total "IN" that particular TIER. Nothing from TIER 1 will count.

Example: 25 Rounds on HORIZON, 25 rounds on COMEBACK and 25 rounds on TERRACE will unlock TIER 3. YOU DO NOT HAVE TO GO IN A PARTICULAR ORDER! You also DON'T have to reach 25 in each map. You could go 40 in 1 map, then maybe a 35 in the ext. Up to you.

The maps for TIER 2 are: HORIZON, COMEBACK, TERRACE and INSTINCT


Step 3: In TIER 3, you must complete 100 rounds in total "IN" that particular TIER. Nothing from TIER 1, or 2 will count.

Example: 25 Rounds in each map will unlock TIER 4. [25 x 4 = 100] Example for step 2 applies.

The maps for TIER 3 are: GREENBAND, SOLAR, RECOVERY and DEFENDER


Step 4: In TIER 4, you will have RIOT unlocked.
Start up the map, and make it to round 11.
After ROUND 10, listen carefully and pay attention in order to understand what happens.
ZOMBIES HAS NOW BEGUN.


ENJOY GUYS! Hope I Helped!

Thanks Again To TMARTN, MrDalekJD, and others who also gave a tutorial. I  only listened to TMARTN at the time.

http://youtu.be/yt45Qz6gLBg

And DON'T FORGET ABOUT ME!

  how about no thanks way to much work just to unlock something for 1 round... I could go on waw, bo1 or 2 or cod online and play zombies/cyborgs as long as i want .

how about no thanks way to much work just to unlock something for 1 round... I could go on waw, bo1 or 2 or cod online and play zombies/cyborgs as long as i want .

LOL Funny... It's not even the same 
Zombies in this game actually feel really cool.

LOL Funny... It's not even the same 
Zombies in this game actually feel really cool.

If someone liked this shit enough that they felt they needed it but couldn't get the game, they could make it in a month or 2. Those models and general texturing look lazy, but the art design for the cutscene was beautiful, meaning they're gonna pull a Ghosts and draw us in with the art. It looks like shit ingame, but they reel you in with cutscenes. The game, overall, looks okay. I'm definitely waiting a month or 2 before I even consider getting it though, because I DID buy Ghosts so.... Not gonna fool me again.

If someone liked this shit enough that they felt they needed it but couldn't get the game, they could make it in a month or 2. Those models and general texturing look lazy, but the art design for the cutscene was beautiful, meaning they're gonna pull a Ghosts and draw us in with the art. It looks like shit ingame, but they reel you in with cutscenes. The game, overall, looks okay. I'm definitely waiting a month or 2 before I even consider getting it though, because I DID buy Ghosts so.... Not gonna fool me again.

Ghosts was bad for sure but this game I can assure you is pretty good. Better then Ghosts and almost like BO2. Great graphics even on PS3, not much lag compared to Ghots because ghosts used to lag even with Bots in a Private Match.
This game has A LOT to go for. Weapons, ranks and camps. Its hard to get used to but once you got the feel to it, your good. Though its easy to die in this game if you don't think about what your doing. This isn't Ghosts fast death but its definitely a bit faster then BO2.
Yeah just wait though if you want.

This is the same for PC as well, not just ps4/xbox

This is the same for PC as well, not just ps4/xbox

Fixed. I just forgot.