10 Video Games That Offer Their Best Content AFTER You Beat Them

5. B-Sides & C-Sides - Celeste

Last year's universally-acclaimed indie platformer Celeste is one of the most brilliantly brutal entries into its genre in recent years, though committed players can battle their way through it's tough-but-fair main campaign in around 8-10 hours.

That's just where things start getting interesting, though, as the post-game calls upon players to collect a single, impossibly-placed cassette tape within each chapter, which will unlock a much harder "B-side" version of said chapter. For the eighth and final chapter, though, there's the additional hurdle of amassing 15 Crystal Hearts.

Slogging through the B-sides will probably take you at least as long as the main game did, but it doesn't end there.

Beating the B-sides unlocks the somehow even more challenging C-sides, while unlocking the final C-side chapter requires players to collect all 23 Crystal Hearts.

By this point, you're easily looking at 30-40 hours of play-time, and it goes without saying that the new tricks you pick up while completing the B-sides and C-sides create an added incentive to revisit the core campaign.

While many games would turn such a challenge into a soulless combination of fetch quests and infuriatingly challenging platforming, Celeste is a rare white-knuckle effort that only becomes more entrancing and addictive the more difficult it gets.