Despite high framerate in a lot of games, the Pentium is often a
stuttering mess, thus it is not recommended.
Thanks for posting that video link and thanks to the person who started this discussion. Just joined today because of this discussion. A few months ago, I upgraded from a first generation (Clarkdale) core i3 530 to a Pentium G3258. G3258 cost me $75. 3+1VRM phase H81m (new)motherboard cost me $45. The only thing I regret is no VRM heatsink on the motherboard. Cooling that 1VRM phase which powers the ram has not been easy. total upgrade cost was $120. re-used everything else.
I have many praises for dual-core pentiums, but let's start with the negatives. First, I strongly believe, that an overclocked dual-core, if intended for gaming, should only be recommend to PC "enthusiasts". Games can stutter and even briefly freeze when played on a dual-core cpu. If the hardware/software are not optimized, then there is a good chance the gameplay experience could be stuttery or jittery or simply low frame rate. I strongly suggest not to recommend a dual-core to random people, who may know little or nothing about PC hardware/software gaming.
If you are an old-school gamer, such as me, it can be a lot of fun to game on a dual core cpu, because you must minimize cpu usage of everything except the game while also maximizing cpu performance. Anything running in the background could contribute to stutter or low fps. Also, lately, Microsoft has been aggressively pushing patches which some disable Pentium overclocking on non-Z boards. Other patches might significantly use one cpu core (windows telemetry). With only two cpu cores, it helps to have high performance ram. Many Pentium owners probably bought cheap ram to go along with their cheap cpu and cheap motherboard, but unfortunately, that low performance ram is not good when you only have 2 cores and need to finish processing something as quickly as possible in order to not stutter, jitter, freeze.
Another major pitfall is running AMD graphics card with a dual-core cpu. I have read discussion about more "dx11 overhead" in AMD drivers and in the benchmarks I have seen, it seems to be true. If I had AMD gpu, then I would definitely prefer the Athlon instead of the Pentium because the extra cores will be needed by the AMD dx11 driver, or wait for Zen.
Someone made a good point that people who buy cheap cpu's probably don't pay for PC games. And that may be true. But it's also a catch-22. Because if PC games starting blocking dual-cores, then no one with a dual-core will buy such a PC game, or they will demand a refund. I do often play mmo games, and my experience with mmo gamers is that they are quite different than non-mmo gamers. mmo gamers, from my personal experience, are gaming on laptop/notebook,or non-gaming PC, yet some mmo gamers spend a lot of money on mmo games. since I'm an old-school gamer (who plays many games including mmo's), I don't understand why mmo gamers play on weak hardware, but that's just how it is. Just pointing out that the spending/gaming habits of mmo gamers and non-mmo gamers can be quite different. Since Mirror's Edge is not a mmo, I would definitely put mirror's edge in the "more likely to pirate" category than a mmo game.
It's not easy to get smooth performance in some games. I even tried The Division (when in beta), but could not get the hack to work right, and it would not run. For sure, I won't be buying any games which are blocked on a dual-core, but I am definitely curious to know if it's possible to make them run and see how they perform
In my youtube channel, all my gameplay videos are recorded on a Pentium dual-core, and also with only 4GB ram. Most of the games are legally used/licensed, but occasionally I download something "improperly" just for testing and then delete it. If anyone wants to gift me a game to be tested/recorded with my G3258 (steam account name = partol), I will love you long time.

There are more than 100 games in my steam account but most are not new.
old,unpatched GTA 5 playing smooth on G3258 @4.4GHz
https://www.youtube.com/watch?v=TieeqIuhWqE
youtube rumor is that, when patched, GTA 5 stutters on dual core, but I cant test that.
mirror's edge 1 (fully patched through steam). 60-62fps.
https://www.youtube.com/watch?v=gPvZh999rUw