When comparing Dungeons & Dragons 4th Edition vs GURPS 4th Edition, the Slant community recommends GURPS 4th Edition for most people. In the question“What are the best tabletop RPGs?” GURPS 4th Edition is ranked 10th while Dungeons & Dragons 4th Edition is ranked 61st. The most important reason people chose GURPS 4th Edition is:
GURPS can be as crunchy as you like, with rules available to cover any situation, but at its core, there are only about three rules you need.
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Pros
Pro Concise and consistent rules
Compared to prior editions, 4th Edition D&D has dramatically simplified rules. There are very few special cases to remember, and all character classes (Fighter, Wizard, etc.) share a common pattern in how they gain and use combat abilities.
Pro Excellent tactical combat system
As a grid-based combat game, 4th Edition offers well-balanced and tactically rich gameplay. In particular, it features numerous effects which force or prevent movement, often preventing simple "charge and attack" tactics.
Pro Focus on heroism and fun
4th Edition downplayed simulation, and instead embraced cinematic action. The players are assumed to be the main characters of a story which revolves around them, rather than merely one faction in a far larger world.
Pro Best balanced version of D&D
Other versions of D&D tend to use a "balance over time" system, where some character types are weaker to start with and stronger later on, and vice-versa for others. However, this works poorly if your game doesn't continue for a long time, or starts with PCs already at a higher level. 4th Edition is the first - and so far only - version of D&D to do a good job of making characters similarly powerful at all levels.
Pro Character death is uncommon
To encourage boldness, characters are far harder to kill than in any other edition. This also allows players to invest heavily in the story and personality of their characters without facing the potential buzzkill of loss.
Pro A unique D&D experience
Not weighed down by sacred cows, and arbitrary rules for the sake of nostalgia and identity.
Pro Modular rules
GURPS can be as crunchy as you like, with rules available to cover any situation, but at its core, there are only about three rules you need.
Pro Great sourcebooks
GURPS sourcebooks are famous for being comprehensive guides to the settings/genres they describe, to the degree that even people who don't play GURPS find them useful.
Pro Option for Cinematic Rules
There is an option to make combat far less deadly.
Pro Long character creation creates a bond with your character
Spending a lot of time creating your character also helps with creating a bond with them. This way you will be more encouraged to keep them alive than going around doing dangerous things which would most likely end up killing them. Moreover, In depth character creation flushes out the back stories that enrich the role playing experience. Vampire also has a lengthy character building process for this reason.
Pro Character mortality
In GURPS, characters can be killed by a single blow to the head with a wood plank. For gamers seeking a more "realistic" level of mortality, GURPS is your game.
Cons
Con Too much focus on combat, not enough on roleplay
Con Ovely complicated
Con Not enough customization
Multiclassing has been reduced to the point where it is rarely useful past the first feat & limited to one extra class.
Con Combat drags
Due to the scaling of player damage vs. monster hit points, even simple fights can take a long time to resolve, particularly at higher levels.
Con Suspension of disbelief is often difficult
Making it fun was such a priority in 4th Edition that it frequently trumped making sense. This manifests in ways ranging from "minions" who die in hordes at the lightest touch, to broken weapons simply repairing themselves.
Con Grid combat is required for best combat experience
Though most other editions of D&D assume miniatures are used for combat, they have all provided rules for playing without them, while 4th edition has not. It even goes as far as to measure distances and ability effects in terms of "squares.".
And while it's possible to play the game without a grid, 4th edition combat places so much emphasis on powers and abilities that move you and your opponents around the battlefield that keeping track of such movement is important enough where playing 4th Edition without minis or a similar system loses most of the interesting parts of the combat system.
Con Equipment is mandatory to be efficient
Con It's the easy mode of D&D
Everyone has spells and unlimited HP.
Con Extremely Simulationist
Con Requires too much GM babysitting
Too many options with no setting structure and the freedom to do whatever is a liability, not a perk.
Con Boring rule system
Con Boring rule system
Con Core rules need two books
Con Long character creation
The lion's share of the work in GURPS is front-loaded: characters are built on points, pieced together with attributes, advantages, disadvantages, quirks, skills, powers, spells, cybernetics, and whatever else your game requires. Expect to spend easily an hour or more creating your character.
Con Option paralysis
Sometimes having so many dials to turn is not a good thing. It can be hard to create a game with so many options available.