Fortunately, players who own the original Dead Island and Dead Island Riptide can still download and play them but people who don't own the game are outta luck. I'm not sure if co-op will be less useful on the original since players who the DE can't play with players with the original, and you also have to buy the Definitive Edition to play Now play co-op, and try to survive and complete 30 waves to get Morituri te Salutant and Death Incarnate. These trophies may challenge you, but it becomes much easier with more co-op partners, which can be found here. STEP 4-Clean up on Remaining Trophies Add a friend of the person who will answer you or also wants to play and choose on the time game. Also do not forget to enter the group chat, it will facilitate communication with other members of the group. Play Dead Island - Definitive Edition at least 28 days after starting it for the first time. Complete 5 quests in a single co-op game with the same partners. cheers man, i'll check it out! Why they made a game that puts together the features of borderlands and left 4 dead, but didn't think splitscreen was important to include, I'll never know. Playing solo it gets old really quickly. I picked this up to play with a few friends and it's pretty fun in that aspect. Devide Oct 16, 2016 @ 10:51am. Originally posted by Lost In The Sauce: im sure that they had to use new things for the game that just wouldnt allow for multiplayer on different versions. its like if you get 1 version of a modded map on cod waw but since the other person has a different version than you, you cant play together. Yes but then they QojalFamly Jan 5 @ 4:45am. Trouble with co-op. Hi im nas, i want to play the game with my friends, how can i join him. The author of this topic has marked a post as the answer to their question. Click here to jump to that post. Originally posted by SturmMG: You can join your friends either when they send you an invite or you send them an invite. For Dead Island: Definitive Edition on the PC, a GameFAQs message board topic titled "Need some friends to co-op with". cRP1h0.