Logically, any time Ian sends you ammo, he should be able to send you oxygen at the same time, right? Unless he has a limited supply of canisters. Even then, given that the marine survived, it's likely he had more than the one mistakenly sent to the top of the level.
: I kinda like this idea. It would also give the player an incentive to explore
: the level a bit (though maybe not on DeathWish). If however we decide to
: have only the one O2 canister on the last G3 level, would it be possible
: to place that canister nearer to where the player teleports in? There are
: two ammo caches on that last level (at the extreme east and west end of
: the level) that I would love to get, but have never been able to due to
: the lack of O2. On DeathWish, I would rather not have to enter the airlock
: to pick up that O2 canister, and then go back out to get that ammo. It
: would be more sensible to grab the ammo and O2 on the pad you teleport in
: on, fight as many enemies as you wish and/or grab those two ammo caches,
: and then enter the airlock. Besides, being able to run around outside
: before entering the airlock usually gets those beasts and turtles to
: fighting, giving you time to go grab those two ammo caches.