When comparing Assassin's Creed Unity vs Portal 2, the Slant community recommends Portal 2 for most people. In the question“What are the best Online Co-Op games on Steam?” Portal 2 is ranked 1st while Assassin's Creed Unity is ranked 59th. The most important reason people chose Portal 2 is:
While Portal 2 requires focus and logic, it does not punish players for causing a bit of mischief. The instant respawn system means trolling your friend will affect almost nothing in the game, as there are no in-game setbacks when you die. Being able to stop at any point in the game to just goof around is great for releasing some steam, even when it is at the expense of your co-op partner.
Specs
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Pros
Pro Crouch walk finally implemented
Assassin's Creed Unity has finally added in a method for players to crouch-walk, allowing them to remain hidden going from cover to cover. It makes the stealth controls much more fluid, giving you the freedom to stalk your target from a closer distance instead of relying on you blending in with the crowd or staying on a rooftop. This was an often asked-for mechanic and is now finally implemented into the game series.
Pro Four-player online co-op
Assassin's Creed Unity features up to four player online co-op. You can join up with three other friends or get matched with others to play through certain assassination missions together.
Pro Intuitive stealth gameplay
The stealth mechanics feel natural and fluid in how strategic they are.
While tracking your targets, you blend in with each city's citizens or climb up to the tops of buildings to perch there and avoid getting spotted by the templar or their guards. You can either wait for the perfect opportunity to strike with a hidden blade up your sleeve that silently assassinates your target, or you can go all-out and have a sword duel with them if you'd rather take a more aggressive approach. After they're dead, you make your escape and become incognito again.
Everything goes together nicely in a way that feels satisfying.
Pro Impressive recreation of Paris to explore with buildings to climb freely
The city of Paris is beautifully done. The level is massive and dense with detail, with well-designed areas from the era such as towers, open plazas, religious buildings, and recognizable landmarks. You can climb anything, anywhere, and run along the rooftops as much as you want. Scaling the tallest places gives you an amazing bird's eye view of the city and the mountain ranges beyond, along with a vantage point to plan out how to assassinate your targets. The realistic architecture makes Assassin's Creed Unity feel like a true period piece set in Revolutionary Paris.
Pro Wide range of customization
There are lots of options to customize your character. You can change your weapons and your appearance, down to the individual hood that you prefer to wear. The sheer amount of things you can choose from is pretty impressive, helping you feel like your character is really your own.
Pro Co-op does not punish when you want to goof off with or troll the other player
While Portal 2 requires focus and logic, it does not punish players for causing a bit of mischief. The instant respawn system means trolling your friend will affect almost nothing in the game, as there are no in-game setbacks when you die. Being able to stop at any point in the game to just goof around is great for releasing some steam, even when it is at the expense of your co-op partner.
Pro Huge selection of user-generated content that should appeal to any use-case
The game has more than 60,000 co-op puzzles created by users through the Steam Workshop and through mods. Because it is user-generated content, the quality and size of these puzzles vary widely, including everything from simple, one-off chambers to full-fledged expansions with high-quality stories, voice-overs, and new gameplay elements (for example, Mel). By having such a selection of content, there should be something that appeals to just about anything someone is looking for.
Pro Entertaining and well delivered voice acting
Voice acting for Wheatley the AI robot is done by Stephen Merchant (Extras, The Office UK, Life's Too Short) in humorous fashion. His delivery is well executed on all dialogue. On top of this specific experience, the rest of the voice acting of every other character in the game is performed just as well, in part due to the fact that the dialogue was written in a funny smart and entertaining cool fashion. This makes for a top quality listening experience that shows a lot of care was taken with the acting of the game.
Pro Creates a sense of accomplishment through a high level of teamwork
Game is shit
Pro Challenging puzzles that require creative thinking
Pro Witty and funny character driven story
Four major characters drive the single player poop campaign, and they are amazing. Three of which have explosive personalities, bring humor, suspense, sadness, and empathy. The other being Chell, who doesn’t speak but her interactions with the rest of the cast make her all the more mysterious and interesting. Most of the time you don’t even see or directly interact with the characters, but that just shows how great and cool they are.
Pro Cross-platform co-op
As long as both players have a Steam account, the co-op is able to be played even if one user is playing on the PS3 while the other is on a PC.
Pro Well implemented tools that improve teamwork
Pro So large in scope that it takes multiple playthroughs to see everything
Portal 2 is larger in every way when compared to the first title, from the longer and more detailed story to the larger levels and new game mechanics. This makes for a title that will last 8-9 hours minimum, with many elements that are worth revisiting, not to mention the co-op section of the game, which is separate from the single player story.
Pro Versatile selection of co-op multiplayer
It’s possible to play a multiplayer game for free online using the Steam servers, as well as locally on your machine using split-screen (the second player must use a gamepad controller if playing locally). This keeps the multiplayer options versatile to any players needs.
Cons
Con Generic premise of a revenge story
The revenge story has been done to death, and Assassin's Creed Unity doesn't really add anything new here. From the beginning of the plot, you see some of the major cliches that often pop up in these types of tales. And while Arno's cause is just, it's hard to care on an emotional level about his mission to kill Paris' high-level templars. But if you're not one to care too much about stories in games, then you probably won't even notice that anything's off.
Con Unsatisfying ending that ends on a lame note
While the story itself is passable, the ending may leave a bad taste in your mouth. After a a generic final boss and an unnecessary and frustrating character death, things just end abruptly. There's no closure, and there isn't a real sense of satisfaction at the end of your journey.
Con More of the same
The gameplay of Assassin's Creed Unity is just more of the same from previous titles. If you've played one Assassin's Creed up to this point, you've pretty much played them all. It's the same type of revenge story of an assassin seeking out the templars, the same bloat of icons and little things to do across the map, with the same type of stealth gameplay, and the overall same structure to the missions. Aside from the new crouch mechanic, the customization, and the location in Paris, this is too similar to other games in the series.
Con Main co-op campaign is short
The co-op campaign in Portal 2 is about 4 hours long for experienced players, meaning it could be beaten in a just a couple days. With almost zero replayability, this makes the game feel incredibly short. Luckily, hundreds of hours of user-generated content is available.
Con It's already on every coop list since 2011
Con Steep co-op learning curve
Although the single-player campaign features a gradual learning curve, co-op offers no mercy. The puzzles start off hard and only get harder. It’s highly recommended that you play through single-player first if you are not familiar with Portal's mechanics.
Con Sense of accomplishment is often onesided
Con Frequent motion sickness trigger
Con Late game single player can be quite difficult
While the single player learning curve is quite gradual, late game the puzzles can become quite difficult, sometimes leading to the player being stuck for long stretches of time. While not impossible to solve, some creative thinking will need to be done in order to finish.