Train-Made-From-Ripoffs.
Sure if there is a lot of FPSes, but don't ever corrupt our game(store) full of near-indentical ripoffs.
I'm going to put some quote here, it's 2~3 years old through.
Ahh now this is one as old as time.
There were so many Doom Clones that someone actually made a game where all the doom clones (and doom) fought in a huge summoning arena.
When mario was out, everyone had a try at platformers, sonic saw an era of terrible animal mascots, and warcraft sparked a run for MMORPG, most of those failing.
Today it's all Candy Crush and Clash of Clans clone, like tons of them, on mobile.
What I don't like, mobile version.
Mini timers everywhere: Building an house? Wait one minute. A door? Let's wait 5 minutes will ya? Oh you want a new weapon? Come back in 10 minutes. I don't mind hours long timers, this makes me check back later in the day and keep playing in the long term, but what kind of idiot is going to pay to save like 10 minutes? If you quit, you waste time and if you stare at the screen, you waste time and you look like an idiot. I'm looking at you DUNGEON KEEPER with your times in seconds.
The almighty tutorial: You can make a tutorial to explain specific stuff or to invite the player to explore, but nothing irks me more that these 'obscure the whole screen and make the players push buttons in a sequence' type of introduction. It explains nothing.
The interrupting tutorial: At least in the previous one, when you were done you can start playing. In this one, the tutorial pop ups windows while you were in the middle of something. Nice break of focus, buddy. Oh and they cannot be closed quickly, because you really must read about what you were doing already.
Hours long asset downloads: Here's a thing about mobile games. If the package you download from your app store is over 60Mb, it will advise to use wifi. And in most countries this is a big deal. Yet it seems that some dev teams does not understand the meaning behind this and slap a 59Mb package then have the game download a gig or so of other assets. Oh and you cannot close the app to let it download in the background, otherwise that would be easy.