Summary of "Time Travel In Unofficial Portal 3 !? It's Gonna HURT My BRAIN! I'm Missing GLaDOS - Portal Reloaded"

Portal Reloaded (unofficial Portal 3 mod) — playthrough summary

Storyline / setting

You play as an Aperture Science test subject taken through a new testing course that adds time travel. The facility contains a present timeline and a future timeline (20 years later). The future environment is decayed and altered.
Tests teach and force you to use a new time-portal mechanic. The narrative pushes toward a final mission: stop a future incident by becoming the “candidate” that corrects the timeline. The mod shows multiple endings / stasis outcomes.
GLaDOS (the Portal AI) is referenced as missing; voice-lines and testing humor follow the Portal tradition.

Core gameplay mechanics and highlights

Time portals (third portal mechanic)

Allow travel between present and future (20 years apart).
Important properties:
- The present affects the future; the future does not change the present (causality flows forward).
- Surfaces must be intact in both timelines to place/use time-portal locations; some surfaces are destroyed in the future.
- A portal placed on a surface in one timeline may appear or correspond in the other timeline depending on surface integrity and level constraints.
- Time portals transfer player momentum and can carry cubes/momentum across timelines.
- Material Emancipation Grills and special force fields can destroy unauthorized equipment or prevent time-portal placement/use.

Remember: do actions in the present to influence the future — actions in the future will not alter the present.

Cubes and object behavior

You can bring a future-version cube into the present, so you can have two versions of the same cube in one timeline.
You cannot bring a present cube into the future (the game prevents causality violations).
Moving a cube in the present updates its position in the future; moving the future cube in the future can be independent unless the present cube’s destiny is subsequently changed.

New puzzle elements

Momentum puzzles (flings), lasers & reflection cubes, light bridges, excursion funnels (tractor beams), aerial faith plates (jump pads), turret mechanics, timed switches, portal-blocking fields.
The portal-device includes a holographic puzzle-element indicator to visualize where portals and cubes exist in the other timeline.
Levels ramp up in difficulty — the course contains about 25 chambers requiring simultaneous thinking about where and when to place portals and how present actions change the future.

Key strategies, tips, and rule-of-thumb mechanics

Observe the environment: the present looks cleaner; the future is decayed.
Use causality: perform actions in the present when you want to influence the future.
Two-cube trick (very useful):
- Bring a cube from the future into the present to have both the “future cube” and the “present cube” available simultaneously.
- You cannot take a present cube forward into the future.
Momentum carries through time portals — use speed and jumps in one timeline and transfer momentum into the other for fling-based puzzles.
Time portals and normal portals interplay:
- Plan both where (which surfaces) and when (which timeline) you place portals.
- Time-portal surfaces must exist in both timelines to be usable.
Use the portal-device’s holographic puzzle indicator to visualize other-timeline positions before committing.
Material Emancipation Grills will destroy cubes or equipment that pass through them; check for grills before moving items across portals.
When stuck on a tricky timed or multi-step puzzle:
- Break the puzzle into substeps; set up stable placements (leave portals/cubes/buttons in place) and then perform transitions.
- Save often to avoid redoing long sequences.
- Use cubes to interrupt lasers/signals for timing windows.

Special notes:

Time-portal activation force fields can disable your ability to shoot time portals (they don’t always destroy already-placed portals).
Excursion funnels and faith plates can exist in both timelines but may behave differently — test both.

Examples of step-by-step approaches (from the playthrough)

Creating two usable cubes in one timeline:
1. Move a cube in the present to the desired spot (this updates its future position).
2. Go to the future, pick up the future-version cube and carry it into the present (allowed).
3. Now you have both present and future versions available simultaneously in the present.
Using mirrored portals to travel between broken/different rooms:
1. Place portals only on surfaces intact in both timelines.
2. If a target surface is destroyed in one timeline, find an alternate surface that exists in both timelines or manipulate the present so the future counterpart becomes reachable.
Timing multiple switches across timelines:
1. Pre-place portals and leave cubes/buttons in positions that will persist when you switch timelines.
2. Use the holographic indicator to confirm positions before a timed run.
3. Coordinate jumps/faith-plate launches with portal transfers so momentum lands you where needed.

Practical tips from the playthrough

Expect a learning curve: later chambers combine many mechanics and can be brain-bending; take breaks and save often.
Use the holographic puzzle indicator to reduce trial-and-error.
When completely stuck, look up brief solution videos — the player used MMOFreak’s YouTube guides for the toughest levels.
The mod (released in April) has its own voice acting and puzzle design; it feels like Portal with added complexity from time mechanics.

Notable mentions / sources and people featured in subtitles

MMOFreak — YouTuber whose videos helped solve several levels.
GLaDOS — Portal series AI (referenced as missing).
Yeti — voice actor mentioned (ran a speed-play under two hours).
Chat/viewers mentioned in the stream subtitles: Mathai, Duncan, Ryan, RestlessSquirrels, Rick (Rick Natsu), Jefferson (dark stalker), Derby, David, Apex, Ray, Richmond Center.

Final note

Portal Reloaded is a clever, challenging fan-made expansion to Portal 2 that adds a time dimension and new puzzle elements. It rewards careful planning about when and where to place portals, judicious use of the future-cube trick, and creative momentum/time manipulation. The playthrough shows some puzzles are solved faster with a short guide, and the mod contains roughly 25 increasingly difficult chambers.