If a price tag doesn't bother you, and you have four controllers and friends, AND you don't mind a game that you'll never want to touch after a solid evening of fun, then Tiny Brains is still a worthy recommendation. That's a lot of caveats, though, and when there are games like Super Mario 3D World offering similar chaotic fun with hours of additional gameplay and challenge, Tiny Brains doesn't make the grade.
The bigger issue is that Outlast accomplishes far more as an experience than it does as a game. That would be fine, but it tries to be a game more often than its stealth mechanics and AI could bear. Is it scary? For sure. But it's also capable of falling apart completely, deflating its own scare tactics, and leaving you wondering why Miles Upsher can't throw a single punch.
The competitive game at the heart of Towerfall Ascension is still the main event, so if you don't have extra controllers and friends you'll probably want to pass. That said, it's nice that there's something fun to do with the game even when you're on your own. It's not enough to recommend the game entirely as a solo experience, but I still had a ton of fun with it and see myself going back for more, even if no one is around.
Whistleblower hits far fewer snags than the original Outlast in its attempt to scare the bejeezus out of you. It's a brisk, enjoyable, genuinely scary experience, and a great supplement to the story of the core game. If you already liked Outlast there is no doubt in my mind that you'll love Whistleblower. And if you only sort-of-liked the original, well, there's good news for you here too.
On the one hand I have to commend DreadOut for trying to be more than the no-depth scare factories that so many other indie horror games aspire to. It's a callback to the third-person horror games of the PS1/PS2-era and I appreciate that. On the other hand, every attempt to inject that much-needed depth is met with frustrating design decisions. I wanted it to be over well before the end of its brief, two-hour playtime.