The First Templar starts off fairly weak: a brief voiceover describing the Knights Templar and the central protagonist Celian's obsession with finding the Holy Grail, before cutting to him and his fellow knight Roland finding a murder scene at a small church, cutting between observations like half the pages had fallen out of the script. However, after this shakey opening the game picks up speed fairly quickly.
My first impression of the game was that it was similar to Viking: Battle for Asgard; an inoffensively average hack n' slasher with a few stealth elements. And while this assessment isn't entirely inaccurate, the longer I played the more I got NWN2 vibes from it. It's not really an RPG - your equipment is purely aesthetic and by endgame you can afford to fill basically your entire skill tree, and the only choice you're allowed to make is literally the last thing you do in the entire game - but it's very much the same sort of feel of incredibly proficient killers wandering into incident after incident while trudging in the general direction of their actual goal.
The player characters, while rather simple, get a bit endearing after a while, bantering constantly while navigating terrain and trap, but besides them there are precisely three other characters that get any level of characterization to them besides plot device to move the story forward. Celian himself is unfortunately a bit bland, a generic grizzled badass whose only apparent character traits are an almost crippling hero complex and a mild phobia of rats (which comes up precisely twice and never has any affect on story or game). Even so, his unabashed good-guy nature had some charm to it, making the game feel like a magic-free DnD campaign where you play as a paladin.
One thing that helps distinguish it from Viking: BfA is that the stealth mechanics actually work - sort of. When you're detected things switch into action mode instantly, giving no margin for error. Thankfully the minimap lets you know precisely where the enemy's sightline is and your support character is handy for quickly dispatching guards in pairs, making winding through an enemy camp with a series of neck snaps feel like a cooly effecient guerilla mission.
The combat itself is also nicely varied, with enough different ways to punch people's faces in that I was still experimenting with it by game's end, but with a small enough menu that you weren't left simply forgetting half the controls. My only real complains are that the combo attacks can be finnicky at best, often resulting in me shield-bashing an opponent I had been trying to bowl over, and that especially in late game enemy health becomes ridiculously high, with fat, shirtless torturers somehow able to tank half a dozen heavy sword blows to the chest. The fact that you never gain any upgrades to your basic damage output doesn't help.
All in all, I recommend trying it out if you like fun little hack-n'-slash games that aren't worried about being especially ambitious. However, I will leave one further criticism without explanation. You'll understand if you play through it.
♥♥♥♥ bear traps.