Aliens vs Predator is a first-person shooter developed by Rebellion Developments and published by Sega. In the mission Ruins for the predator, the player will enter the ancient ruins of the predator civilization and will have to fight an alien queen in order to get the last weapon: the Combat Stick.

1. Go straight and jump over the gap after the bridge collapsed. Interact with the first switch. You will need two more to open the gate in front of you.
2. THe second switch is on the left, on a small platform alongside the canyon.
3. For the third one, go to the right and look down the hole to locate a platform. Fall down on it and go to the right one to find the switch. Be careful with the aliens attacking you.
4. Enter the temple through the door you just opened and kill the three xenomorphs inside. Use a mine or your Smart Disc to kill them easily. In the next room, you will have to use the platforms to get on the next level. The probleme is that the platforms are moving in and out of the wall. When you face the wall and you turn your back on the entrance, jump on the platform a little bit on your left. Then, check the upper platform on you left, and the one after to reach the next level.
5. Activate the switch to open the door. Enter and you will get a new mask that will aloow you to spot the xenomorphs.
6. Exit using the left path. Once outside the chamber, use your new mask's ability to spot the aliens and kill them. Turn left and go to the end of the path. Jump on the platforms across from you and head right. Jump on the platforms in front you and turn around the last one to reach an elevator. Do not bother killing the aliens, there are too much of them. Run on the bridge to get an audio message.
7. Jump on the platform below the bridge on the right and enter the temple.
8. The next part is a real maze full of aliens. Take the right path and head to the marker on your screen. You will finally see a stairs and three marines will be waiting for you. Use your cloaking device and kill them all. Then, to access the ruins, you will to enter from the second level. Jump on the higher platform to reach a door on the second level and activate the switch.
9. Enter and take a look at the area. You will have to reach the exit just opposite of where you stand. There are some humans in the area and a lot of aliens. Take the right path to avoid the sentry gun and run to your destination, using jumps. Do not bother fighting, you will lose time. Interact with the switch to open the door.
10. To exit the next area, you will have to activate three symbols. If you want, you can first kill all the marines in the area. You can see the location of the three symbols using the left trigger. If you consider north and south when you enter the place, the first one is north-west nea the exit, the second one is east on the lowest level and the third one is at the center, on the side of the highest pyramid. When they are all activated, leave the ruins.
11. Then, go down the stairs and enter the room on your left. Head to the lower levels and enter the arena. You will face an alien queen. An easy way to defeat her is to equip the Smart Disc and throw it at her. Once she gets hurt, retreat and shoot it again. If she gets too close, escape and find her again to use the Smart Disc. Do not bother killing the other xenomorphs. Focus only on the queen. If you have extra energy, use Proximity Mines to really damage her. Repeat the process until she dies.
12. Then, get on the upper level of the pyramid to get the spear and clear the mission.