I do remember seeing one of their terms saying something along the lines of "similar games will count as one" for the purposes of installs+revenue, that or someone mentioning it. Can't seem to find it anymore, maybe they removed it? EDIT - Found one mention of it, "Games or apps with substantially similar content may be counted as one project", Unity probably went back on this one, as it's not listed on the FAQ right now
Though considering Pokemon Shining Pearl/Brilliant Diamond runs on Unity, I doubt they'd want to let such a high selling game go untaxed.
The terms have been changing every day, it's such a shitshow. Like maybe they should've discussed and ironed out the specifics with the community before changing everything idk.
Just goes to show nobody at Unity bothered to think this shit through. With the clause they're going to have so many lawsuits with similar-but-not-same games, without the clause devs can dodge the fees like this.
But this will cut the Steam metrics in half and thus the Steam store algorithm will push the game to the Steam users less. Unless of course they both sell well then you get put in front of a user twice.
This strategy can backfire if your game gets popular enough. If both versions are counted separately and they each pass 1mil downloads and the 12 month revenue threshold then you're paying the higher per-install fee brackets twice.
To demonstrate, let's imagine a game like this has 4 million installs in the first year and uses the Enterprise plan for the best pricing structure.
Scenario A: single version
First 1,000,000 @ $0.00: $0
1,000,001-1,100,000 @ $0.125 : $12,500
1,100,001-1,500,000 @ $0.06 : $24,000
1,500,001-2,000,000 @ $0.02 : $10,000
2,000,001-4,000,000 @ $0.01 : $20,000
Total cost: $66,500
Scenario B: two versions priced separately, 2 mil installs each
Each one is the first four lines above, so the total cost is $46,500*2 = $93,000
In either scenario, additional installs beyond these 4 million cost $0.01 each (regardless of which game it's installed on). There's a fine line of staying below the annual revenue thresholds (or not too far above) where this strategy does save you money.
There's a minimum install limit before the fee kicks in. But since Unity can just make more retroactive rules, this strategy can implode at any moment.