Watch out captain! Cliff ahead! TheBrownCanadian was able to glitch out Assassin's Creed IV and make it look like a Spelljammer-style space pirate game. Anti-gravity engines were not that advanced in the 1700s after all.
Corporate Evil: here's a small but fun easter egg that ties together Assassin's Creed 4 with another Ubisoft game—Watch Dogs. You can see this yourself while hacking computers in the Abstergo offices in AC4. Video by MrSkillToKill2.