Silent Hunter 5 was later made playable in Uplay's 'offline mode' the following year, effectively eliminating the online requirement entirely.

The always-on requirement was quietly lifted towards the end of 2010, being changed to a single validation on game launch. The scheme quickly came under fire after a denial-of-service attack on Ubisoft's DRM servers in early March, 2010, rendered Silent Hunter 5 and Assassin's Creed II unplayable for several days.

Initially Uplay required a constant connection to the internet for Silent Hunter 5 to run, halting the game if the connection was lost during gameplay. Silent Hunter 5: Battle of the Atlantic uses Ubisoft's Uplay for digital rights management. With more testing and less bugs this game could have been the best in the series', while PC Gamer UK criticized the bugs and DRM but said that without them, 'it would be the best Silent Hunter yet.' DRM GameSpot's Brett Todd said, ' Silent Hunter 5 has promise, but this buggy and unstable game needs to be sent back to the drydock for some serious refitting.' ģDJuegos' Álvaro Castellano Córdova said that ' Silent Hunter 5 is the most accurate simulation of World War II submarine conflicts in the Atlantic. Many bugs and performance issues will also bog down your ability to enjoy the game.' The campaign missions are fairly low-key, with quick missions not really matching the depth of the gameplay. GameZone's Steven Hopper said, 'The game offers some deep elements, but the overwhelming interface and steep learning curve make it very difficult to get into. The game received 'mixed' reviews according to video game review aggregator Metacritic.

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