Arkham Asylum is often mentioned only in passing, skipped over almost as a sidenote before the discussion inevitably switches to Arkham City. However, without Asylum there would be no Arkham series, and I don't mean only in the sense of being the first mind you. Rocksteady took their time to set down the core pillars of everything that makes the Arkham games what they are.

Become Vengeance: The excellent free-flow combat became the standard for not only Batman games but many other third-person action games started here, and it aged super well.

Become the Night: Predator mode, as you can't be The Night without instilling fear in the superstitious cowardly criminals picking them off from the shadows one by one. Simplistic but robust stealth system.

Become Batman: Gadgets and Detective vision allow Batman to interact with the environment, solve "puzzles" and pull some neat combat tricks.

All of it wrapped in a simple but very comic book-feeling storyline.

""The Joker took over the asylum! Mysterious serum turns inmates into monsters! if Batman can't stop him until the end of the night, Gotham will suffer!! Many iconic villains are included in Batman: Arkham Vol.1!!""

It feels very genuine to its roots, while getting us up to speed on the status quo of many characters, and showing at what point in his career this version of Batman is at.

If you are not into the powerfist CBT experience and just looking for a 40K Xcom this is not the game you are looking for. This isn't Xcom, It's a faithful recreation of the board game with the same name (with some added mechanics for extra spice).

Space Hulk tactics can be brutal, and will punish almost all mistakes you make. If you are into the high tension and planning your turns carefully, it's great.

The only warning to give is that Online Multiplayer is dead so only custom missions and the two campaigns are left, which are the main attractions in my opinion.

Sniper Elite 4 further evolves the series by taking the glimpses of freedom seen in SE3: Afrika and expanding it massively.
Every mission is an open map with multiple angles of approach, routes, and objectives that allow players to strategize how they will go about it all.

One of the common complaints of the series is that it's repetitive, and it can be if you only focus on just head-shooting every single enemy. But you can also be pretty creative with the tools given to you, set up ambushes using corpses as bait, shooting out lights for better infiltration, detonating grenades on enemy belts with precise shots, gaslight the AI using noise, set up an explosive domino effect with dynamite bundles, and the list goes on. Emergent gameplay that's only possible through the player's creativity. Dare I say Sniper Elite 4 comes dangerously close to being an immersive sim.

As for the plot, there isn't a whole lot to say really, as usual for the series, the story is background fluff to justify bursting nazis' vital organs with high-caliber weapons, and that's good enough for me. Sniper Elite as a series always focused on moment-to-moment gameplay in its infiltration and sabotage scenarios rather than some grand narrative.