Gameplay: Quantity of alien missions depends on difficulty level.

[redv]

Now works next algorithm of missions generator (the wave of missions):

1. Each month generated one terror mission and one random mission.
2. If monthsPassed > 5, then generated 2 terror mission and 2 random mission.
   Quantity of missions does not depend on difficulty level.

I believe, this is wrong. Quantity of missions should depend on the difficulty level. In vanilla Xcom, difficulty level affected on number of missions.

I suggest next algorithm of generator:
Each month, will generate one terror mission and several random missions.
Beginner: 1 terror + 1 random.
Experienced: 1 terror + 2 random.
Veteran: 1 terror + 3 random.
Genius: 1 terror + 4 random.
Superhuman: 1 terror + 5 random.

After 5 passed months, quantity of missions will be doubled.
Of course, real quantity will be less, because duplicated waves in each region will be removed.

[Warboy1982]

the only affect diffictuly had on alien missions was how soon they started launching unprovoked retaliation missions, and we already have that.

[redv]

I don't know vanilla Xcom algorithm, but i can talk about my observations.

OpenXcom. Veteran level.
Current rules: on 31 July i detected 51 UFO. I know, several UFOs was missed. As i understood, quantity of UFOs almost undepends from the difficulty level.

OpenXcom. Superhuman level
My rules (i changed rules during 1st month): on 5th April was detected 50 UFOs. I expect, that on 31 July will detected near 50/3*7 = 116 UFOs. Maybe more.

Vanilla Xcom. Genius level (i played often on veteran or genius level)
I remember, on July-August i was catching up to 100-120 UFOs.

[redv]

I found old saves from Xcom CE:

[Warboy1982]

all the alien mission/UFO spawn timers use vast amounts of random number generation, sometimes influenced by player action. they're FAR too random to claim any kind of accuracy based on a few saved games alone. there isn't even any anecdotal evidence on ufopaedia to support the claim (not that i consider that a completely reliable source anyway)

[redv]

For example: probability of hit is 30%.
One success hit or one miss is not a claim.
But, if you shoot to target 100 times, then the result will be averaged, and you can hit the target near 30 times. This is not the case, this is a law.

About screnshots. This is UFO-112.
So, if will play rational, then on 1 august and "genius" level, you can detect near 110 UFOs (maybe +-10). This is not the case, this is a law.

[Warboy1982]

sorry, but given the 1.7 quintillion possible results, i hardly think this is a fair sample size to base a law on. besides which, i can assure you that difficulty had no bearing on the number or frequency of non-retaliatory missions whatsoever.

[Warboy1982]

i'll be re-checking all the variables and calculations concerning alien missions and UFO generation over the next week or so.