This Alien: Isolation mod tweaks the AI of the Alien to fix some issues and attempt to provide a similar but more organic experience. The focus is to make the Alien: slightly less unfair, able to surprise you in more diverse ways, and omnipresent but still not all-knowing while creating situations as tense as before. Have fun!
== How to install ==
Simply merge the DATA folder provided with your DATA folder in your base game installation directory :)
The DATA folder is located in the Alien Isolation folder, where your game is installed. (Steam/Steamapps/Common/Alien Isolation/DATA)
If you want to back up to the original settings, merge the content of the "Backup BMLs" folder into your DATA folder in your base game installation directory.
If you are going to play the game with this mod, I recommend that you do not read the detailed changes it makes as it might ruin the magic of how the Alien works.
All the modifications were made to the AI Director of the Alien and NOT to the Alien creature itself (the behavior tree is not modified). The difficulty modifiers remain untouched too. A scripted sequence in the main campaign is also slightly modified. Please acknowledge that this mod doesn't add any new feature to the Alien, it only tweaks its behavior by changing values.
Here are the changes made by the mod:
-The Alien is more attracted by player-accessible vents
-The Alien naturally searches in a bigger radius around the player
-The Alien, when thinking a prey is there, will abandon its intuition much quicker if nothing confirms it
-The Alien will search the player actively (out of the vents) a bit more often
Special thanks go to MattFiler for the OpenCAGE mod which allowed me to mod easily, to Nathan for the Unpredictable Alien mod which was an inspiration, to penumbra1979 for their multiple feedback and testing on this mod, and to everyone else for helping me make this mod better by giving awesome feedback!
Improved Alien v1.0
Created by Mr_Koroshiya
-Greatly increased the aggressivity of the Alien again (reduced the resting time)
-Made it so the Alien is very slightly more attracted to the player vents
-Made it so the Alien abandons its intuition a little bit slower
Finally, v1.0 is here! With the changes of v0.5, the Alien was more believable but less aggressive and scary. I decided to make the Alien slightly less logical to allow it to become an unpredictable and terrifying threat again.
This update is similar to v0.4 in terms of aggressivity and difficulty but comes with improvements of v0.5 (like the dangerous vents and lockers). As a consequence, the Alien should now feel like a genuinely terrifying but believable creature.
-Made it so the Alien is way more attracted to the player vents
-Made it so the Alien will check the lockers a bit more often
-Slightly lowered the aggressivity of the Alien
-Reverted all changes made to the Alien behavior in backstage mode
Basically, this should feel like v0.4 but with an even more natural Alien, more tension, and player vents that now really represent a threat! Also, on older versions, it was written that the Alien would act differently than without the mod toward the non-player vents: turns out it was accidentally never implemented, and so, now that we have a version of the mod that is quite stable, I think adding them back would be unnecessary.
This update is a major update of the mod. A lot of testing was needed to get a better balancing of the Alien behavior as well as something I could be proud of. This gets us a lot closer to the 1.0 release! (which should be the next version if no major issue is found)
-Greatly reduced the resting time of the Alien
With v0.3, I felt like the Alien behavior was working better and was effectively less unfair. Although, with the Alien now "fixed", it seemed the creature wasn't as aggressive as before and not as frightening. With this change, the search of the Alien is certainly tenser while keeping enough breathing time for the player and the encounters dynamic. Based on my testing it works well! We'll see how further testing can improve even more this modified Xenomorph.
-Made it so the Alien abandons its intuition even faster
-Made it so the Alien wants to use the player vents a little bit more
-Modified a scripted sequence slightly to normalize it with the changes made to the rest of the AI
I basically tried to push some parameters of the mod even further because I was not satisfied with the results. If it doesn't fix the issues or even break the AI (make it uninteresting), I will abandon this path, start over and try to get better results by using other variables.
-Initial public release