Tobias was originally a CTOS pioneer until the Blume Corporation fired him. He worked on the CTOS project in the bunker along with Raymond Kenney and Rose Washington. It is known that both were pranking Tobias through various ways. After he was fired, Tobias became paranoid, thinking that Blume wanted Tobias dead, just like Kenney. Tobias built his own bridge remote controller to access the Bunker. Tobias also owns a black market shop near the Bunker, which is regularly frequented by DedSec members, as stated by Clara Lille.
While looking for a way into the Bunker, Aiden and Clara hacked a camera and found that Tobias has control over the bridges to the island. They visited his shop, but Tobias was nowhere to be found. By hacking a nearby homeless person's phone, Aiden discovered that Tobias was playing poker in northern Parker Square. He also noted that the call had been traced by two Fixers. Aiden eliminated both before joining the poker game. Tobias was uneasy and stated that he didn't recognize Aiden. When Aiden asked him if he is Tobias, he became angry and flipped the table before running out of the house. Once caught, Aiden persuaded him to hand over the remote control for the bridges to the Bunker. Before leaving, Tobias tells Aiden about his shop.
After One Foot in the Grave, Tobias' Shop, located north of the Bunker's island, becomes available. Aiden can go there at any time and buy fully-crafted tools and one-time hacks.
After Aiden finds 9 Weapons Trade locations, Tobias will call to reveal the location of the final Weapons Trade investigation. He calls again after Aiden finishes that investigation. Aiden then asks Tobias to remove his number, to which Tobias agrees, but later adds that he'll "...call if there's anything else." It's never explained how Tobias got Aiden's phone number.
Watch Dogs: Bad Blood
Tobias became a prime target for the Fixers led by Defalt, as he was the best way for him to get to T-Bone. Tobias was first captured and stuffed in the trunk of a car, and managed to call T-Bone for help, who proceeded to rescue him. Tobias later provides most of the information to T-Bone, in order to find the leader of the Fixers.
Watch Dogs 2
Tobias appears in Watch Dogs 2, but as a cameo. He can be seen at the Swelter Skelter festival, inside of the Thunderdome arena, during the mission Looking Glass. Wrench even references him when talking to Marcus. T-Bone also later mentions that he accidentally left Tobias at the event, where he met Marcus Holloway and his DedSec group.
Tobias has been described as OCD by T-Bone, and can't resist a challenge. Tobias is paranoid, irritable, distrusting, and a bit of a fantasist. He seems to hold a bit of a grudge towards Aiden Pearce, due to his initial takedown of Tobias; nonetheless, the two respect each other. Tobias has been known to indulge in various drugs, which has been described by T-Bone "chemical courage". Tobias also has a number of unique speech patterns, referring to Fixers as "M.I.B's".
- High Intelligence: Tobias possesses mechanical aptitude and is highly inventive. He'll often build tools to covertly sell at his shop.
- Combat Skills: Tobias is skilled in the use of firearms, as he was seen wielding a P-9mm pistol when he was being chased by Aiden Pearce, and he is shown to have decent aim; when Pearce was chasing him through High Grove, Tobias shot at gas tanks to hinder him. However, his combat performance relies solely on the use of firearms, as he was quickly dispatched and disarmed by Pearce when he was finally cornered.
- Athletic Skills: Despite his frail appearance, Tobias was able to temporarily evade Pearce when he was chased through High Grove, notably scaling neighborhood obstacles with little trouble.
Tobias has three Audio Logs which can be found in the Bad Blood DLC. All three are found inside the BlumeForge building, in the room which Eugene must enter to bypass the first laser security gate.
Tobias Frewer X01
"So Blume's been looking at investing into our hackerspace and that's got everybody at each other's throats. Some of us want to avoid the corporate control--kind of goes against the spirit of what we do here, right? But on the other hand, we're talking about BIG money and that means the projects get bigger. We could do something real here instead of just playing around. Blume's promising they won't take away any of our creative control. They say they want to invest, not dictate. Do I trust them? Not entirely. Is the risk worth the reward? Yes. But I'm in the minority here. These guys would rather discuss starship engineering than our future here. I'm going to have to convince them. Also: Why do people fixate on the aesthetics of a starship? There's no need to be sleek in space. Functionality is key, not... not form."
Tobias Frewer X02
"The lab's all worked up over the Blume branding we got. BlumeForge. Sounds fine to me. Pete quit - said he wasn't willing to sell his soul to the dark gods for financial gain. He pointed right at me because somehow I've now become the unofficial liaison between us. Thing is -- I'm not in this for the money. I know, I know. that's(sic) what everybody says. But really--I'm eager to see what we can do. I feel like I've finally been given a shot at something. No more computer repairs and tech support, these guys are giving me a shot to prove myself and I'm going to take it. I've decided to tell Sandy tonight. Can't wait to see her face. She's been working two jobs to support us this year, and I know she's been wanting to give the middle finger to her own dark gods and walk like Pete did."
Tobias Frewer X03
"They moved Rose and I into a proper Blume lab this week and we were introduced to our new project. They're calling it the Central Operating System - ctOS for short. Software to run an entire city. I knew we were going big, but this is ... BIG. We'll be working on a test site, we're calling it the Bunker. I met one of my new partners today. Everybody went quiet when he walked in - he's a hacking legend. Best of the best, they say. Looked like a knuckle-dragger to me. Right away, he started picking on me. Said my parents were, and I quote, "a pair of dirty douchebags" for naming me Tobias and that he's going to call me Frewer from now on. Nobody's called me Frewer since gym class back in high school. I'm not going to let this hooligan ruin a good thing for me."
- One Foot in the Grave
- Jury-Rigged (phone call)
- Final Weapons Trade investigation mission (phone call)
- Needs of the Few
- Connections (phone call)
- Ghosts (phone call)
- Hold the Line
- The Verdict
Watch Dogs 2
- Looking Glass (cameo)
- Tobias is allergic to dogs and cats, as stated in Bad Blood.
- Tobias uses donations to eat, stating that "food stamps are just another way the government tracks people."