Xeno Crisis

Achievement is host only. So 2 people cannot get the achievement at the same time. It is based on how starts you the game.

You can use the Debug and Backer menus to level select the last level and have unlimited health, ammo, and grenades.

First of all, you will want to bring up the debug menu. On the main menu highlight Options and then hold down , , , and then . Make sure to turn on infinite ammo, infinite grenades, and infinite health. Also change the level to HQ.

Next you will need to bring up the Backer menu. Go back to the main menu and highlight Options again and then hold down , , , and then and choose backer 7 Jacqui. Also select HQ as the starting area.

Make sure to change your difficulty to easy on the options menu.

Some tips:
- When going through rooms always go up when you can get a chance. Side rooms tend to only have survivors and will have a dead end.
- Please note that the room order will not always be the same. So use the video for tips on tackling enemies.
- To get quick kills against any enemy throw your grenade directly at the enemy. A direct hit will instantly detonate the grenade to kill the enemy quickly.
- Prioritize the giant gun turrets that shoot in all directions. Throwing a grenade at them and getting a direct hit will instantly kill the turret. There is a cooldown period between grande throws. So instead of always spamming grenade use them wisely and wait for a gun turret to spawn, for there will be a lot of them in this level. In the event that you cannot throw a grenade you do have enough time to kill it with your gun, but you must start shooting it immediately. If you have a second delay you have the potential to get shot.
- After the gun turrets I found the riot shield enemies to be the second hardest enemy. I mainly used grenades to kill them, or shot them in the back when they were focused on attacking my second controller.
- Invisible enemies can sometimes go through walls, so be careful when you are behind cover.
- Always look at the floor to see any shadows. A shadow indicates that an enemy will spawn there. I had many failed runs because an enemy dropped on top of me.
- You can roll with , so if you are about to get shot try rolling away. Please be aware that if you are shooting it will have a second delay before you can roll.

Boss Battle
Phase 1
The only downside that I found to using a second controller is that the end game boss has twice as much health. However, the boss battle is significantly easier than the rest of the level. During the first phase often times the boss will only attack your second controller. If the boss attacks only your second controller, wait for the boss to pause its attack to shoot spiders at you and spam it with grenades. Be careful to avoid the newly spawned spiders. In the event that the boss attacks you, you can just run in a circle waiting for the boss to pause to shoot spiders at you, then spam grenades and kill him. As usual, the enemies such as the spiders tend to attack your second controller.

During the second phase of the boss you can position yourself in the bottom right corner and you will not get hit by the boss and you will rarely get hit by the spiders. Spiders will almost always attack your second controller.

Here is my full run using two controllers. Remember to use the debug and backer menus. I also managed to get an S Rank for the HQ S Rank achievement