Tier 4 is currently unavailable, as the game has not been released yet. However, it should be possible to upgrade your bundle to include it once it is available.
Tier 3 has a limited amount of copies available (~250 remaining)
Tier 1 ($2) Tier 2 ($7) Tier 3 ($25) Tier 4 ($30)
Actions…[Lestrades.com] Nao 尚(September 15th, 2017, 05:31 PM) » Tier 3 (& 4) is super expensive but less expensive than buying the games separately. Still, this publisher bundled all but one of its games from before 2016, so if you can wait for a couple years at most, you can probably save the $25-30 here!