Rainbow Six Siege's 8 DLC operators will require around 25 hours of playtime each to unlock, Ubisoft has said.
Alternatively, players can unlock instant access to each new character by spending 600 R6 Credits (£3.99). With eight post-release operators planned, that means players will have the choice of playing the game for approximately 200 hours or spending up to £31.92 to unlock them all.
Instant access to all 8 operators will also be included in the game's Season Pass, although a price for that has yet to be confirmed.
"The data we have suggests that the average FPS player spends 8-10 hours a week playing their favorite FPS (also in-line with our observation during the closed beta), so it should only take between two to three weeks maximum to unlock an operator," Ubisoft said explaining the unlock requirements. "With about three months between each Season of content, we hope players with regular game time won't have trouble saving up enough Renown to unlock both new operators upon their release."
R6 Credits are an optional in-game currency that can be purchased using real world money, and are entirely separate to the game's 'Renown' XP system. As well as granting instant access to new characters, players can also use R6 Credits to unlock premium weapon skins and Renown Boosters, accelerating the rate at which you earn XP.
The currency will be available to purchase in 5 different denominations at launch, including packs of 600, 1200, 2670, 4920 or 7560 R6 Credits. The higher value bundles offer "more R6 Credits per pound", Ubisoft says.
The 20 operators included in the game at launch can be unlocked "much quicker" than post-release characters, Ubisoft says.
New maps and modes, meanwhile, will be available free of charge to all players immediately upon their release, with no unlock requirements. Four new maps, additional primary and secondary weapons and new game modes are due to roll out before October 2016, with the first pack going live in January.
Rainbow Six Siege launches on PS4, Xbox One and PC on December 1.